A matching circuit, comprising a first matching unit; wherein the first matching unit comprises a fifth inductor (L 5), a sixth inductor (L 6), a seventh inductor (L 7), and a fifth capacitor (C 5), the fifth inductor (L 5), the sixth inductor (L 6), the seventh inductor (L 7), and the fifth capacitor (C 5) are connected in series; the first matching unit further comprises an eighth inductor (L 8), a ninth inductor (L 9), a tenth inductor (L 10), a sixth capacitor (C 6), a seventh capacitor (C 7), and an eighth capacitor (C 8); the eighth inductor (L 8) and the sixth capacitor (C 6) are connected in series, and are bridged between a connection point, of the fifth inductor (L 5) and the sixth inductor (L 6), and the ground; the ninth inductor (L 9) and the seventh capacitor (C 7) are connected in series, and are bridged between a connection point, of the sixth inductor (L 6) and the seventh inductor (L 7), and the ground; the tenth inductor (L 10) and the eighth capacitor (C 8) are connected in series, and are bridged between a connection point, of the seventh inductor (L 7) and the fifth capacitor (C 5), and the ground; characterized in that the matching circuit further comprises a first impedance matcher, a first bandpass filter, a first wave trap; wherein an impedance of the first impedance matcher is a first preset impedance at a first frequency, the first bandpass filter is bridged between a front end of the first impedance matcher and ground, the first bandpass filter enables a signal of the first frequency to pass through, and suppresses a signal of a second frequency and a first harmonic signal of the signal of the first frequency; and the second frequency is lower than the first frequency; the first bandpass filter comprises a first resonator and a second resonator, the first resonator and the second resonator are connected in series; the first resonator comprises a first inductor (L 1) and a first capacitor (C 1), the first inductor (L 1) and the first capacitor (C 1) are connected in parallel; the second resonator comprises a second inductor (L 2) and a second capacitor (C 2), the second inductor (L 2) and the second capacitor (C 2) are connected in series; the first wave trap is bridged between a rear end of the first impedance matcher and the ground, to suppress a second harmonic signal of the signal of the first frequency; the first matching unit is connected to the front end of the first impedance matcher; the first frequency is within a working frequency band ranged from 1.710GHz-1.785GHz and/or 1.850GHz-1.910GHz; and the second frequency is within a frequency band ranged from 820MHz-920MHz; wherein the first harmonic signal is a third-order harmonic of the signal of the first frequency; the second harmonic signal is a second-order harmonic of the signal of the first frequency; and the first preset impedance is 50 ohms. the first matching unit comprises a fifth inductor (L 5), a sixth inductor (L 6), a seventh inductor (L 7), and a fifth capacitor (C 5), the fifth inductor (L 5), the sixth inductor (L 6), the seventh inductor (L 7), and the fifth capacitor (C 5) are connected in series; the first matching unit further comprises an eighth inductor (L 8), a ninth inductor (L 9), a tenth inductor (L 10), a sixth capacitor (C 6), a seventh capacitor (C 7), and an eighth capacitor (C 8); the eighth inductor (L 8) and the sixth capacitor (C 6) are connected in series, and are bridged between a connection point, of the fifth inductor (L 5) and the sixth inductor (L 6), and the ground; the ninth inductor (L 9) and the seventh capacitor (C 7) are connected in series, and are bridged between a connection point, of the sixth inductor (L 6) and the seventh inductor (L 7), and the ground; the tenth inductor (L 10) and the eighth capacitor (C 8) are connected in series, and are bridged between a connection point, of the seventh inductor (L 7) and the fifth capacitor (C 5), and the ground; characterized in that the matching circuit further comprises a first impedance matcher, a first bandpass filter, a first wave trap; wherein an impedance of the first impedance matcher is a first preset impedance at a first frequency, the first bandpass filter is bridged between a front end of the first impedance matcher and ground, the first bandpass filter enables a signal of the first frequency to pass through, and suppresses a signal of a second frequency and a first harmonic signal of the signal of the first frequency; and the second frequency is lower than the first frequency; the first bandpass filter comprises a first resonator and a second resonator, the first resonator and the second resonator are connected in series; the first resonator comprises a first inductor (L 1) and a first capacitor (C 1), the first inductor (L 1) and the first capacitor (C 1) are connected in parallel; the second resonator comprises a second inductor (L 2) and a second capacitor (C 2), the second inductor (L 2) and the second capacitor (C 2) are connected in series; the first wave trap is bridged between a rear end of the first impedance matcher and the ground, to suppress a second harmonic signal of the signal of the first frequency; the first matching unit is connected to the front end of the first impedance matcher; the first frequency is within a working frequency band ranged from 1.710GHz-1.785GHz and/or 1.850GHz-1.910GHz; and the second frequency is within a frequency band ranged from 820MHz-920MHz; wherein the first harmonic signal is a third-order harmonic of the signal of the first frequency; the second harmonic signal is a second-order harmonic of the signal of the first frequency; and the first preset impedance is 50 ohms.