An interleaved polarized multi-beam antenna, comprising: at least one dual-polarized antenna element, wherein the dual-polarized antenna element comprises a +45-degree-polarized first antenna element and a -45-degree-polarized second antenna element; and a first Butler matrix and a second Butler matrix, wherein the first Butler matrix is connected to the first antenna element so that the first antenna element is configured to transmit a first target beam, the first target beam is generated by the first Butler matrix according to a first input signal received by at least one first beam port, and each first target beam points to a different direction; and the second Butler matrix is connected to the second antenna element so that the second antenna element is configured to transmit a second target beam, the second target beam is generated by the second Butler matrix according to a second input signal received by at least one second beam port, and each second target beam points to a different direction, wherein one second target beam is arranged between any two adjacent first target beams, wherein the interleaved polarized multi-beam antenna comprises six dual-polarized antenna elements, first target beams are generated by the first Butler matrix according to first input signals received by three first beam ports (A1, A2, A3), and second target beams are generated by the second Butler matrix according to second input signals received by two second beam ports (B1, B2), characterized in that the first Butler matrix comprises: a first group of couplers, a second group of couplers, and a first group of power splitters, wherein the first group of couplers are connected to three first beam ports (A1, A2, A3) to receive three first input signals, and the first group of couplers generate four signals in total according to the three first input signals and output the four signals; and the second group of couplers are connected to the first group of couplers to receive the four signals output by the first group of couplers, the second group of couplers generate four signals in total according to the four signals output by the first group of couplers and output the four signals, the second group of couplers output two signals generated by the second group of couplers to the first group of power splitters connected to the second group of couplers, and the second group of couplers output the other two signals generated by the second group of couplers to first antenna elements of two of the dual-polarized antenna elements; and the first group of power splitters are configured to: split each of the two signals input from the second group of couplers into two signals, and output the formed four signals to first antenna elements of four of the dual-polarized antenna elements, so that six first antenna elements transmit the first target beams. at least one dual-polarized antenna element, wherein the dual-polarized antenna element comprises a +45-degree-polarized first antenna element and a -45-degree-polarized second antenna element; and a first Butler matrix and a second Butler matrix, wherein the first Butler matrix is connected to the first antenna element so that the first antenna element is configured to transmit a first target beam, the first target beam is generated by the first Butler matrix according to a first input signal received by at least one first beam port, and each first target beam points to a different direction; and the second Butler matrix is connected to the second antenna element so that the second antenna element is configured to transmit a second target beam, the second target beam is generated by the second Butler matrix according to a second input signal received by at least one second beam port, and each second target beam points to a different direction, wherein one second target beam is arranged between any two adjacent first target beams, wherein the interleaved polarized multi-beam antenna comprises six dual-polarized antenna elements, first target beams are generated by the first Butler matrix according to first input signals received by three first beam ports (A1, A2, A3), and second target beams are generated by the second Butler matrix according to second input signals received by two second beam ports (B1, B2), characterized in that the first Butler matrix comprises: a first group of couplers, a second group of couplers, and a first group of power splitters, wherein the first group of couplers are connected to three first beam ports (A1, A2, A3) to receive three first input signals, and the first group of couplers generate four signals in total according to the three first input signals and output the four signals; and the second group of couplers are connected to the first group of couplers to receive the four signals output by the first group of couplers, the second group of couplers generate four signals in total according to the four signals output by the first group of couplers and output the four signals, the second group of couplers output two signals generated by the second group of couplers to the first group of power splitters connected to the second group of couplers, and the second group of couplers output the other two signals generated by the second group of couplers to first antenna elements of two of the dual-polarized antenna elements; and the first group of power splitters are configured to: split each of the two signals input from the second group of couplers into two signals, and output the formed four signals to first antenna elements of four of the dual-polarized antenna elements, so that six first antenna elements transmit the first target beams.