A method for adaptively regulating a static pressure of a ducted air conditioner, comprising: S1, dividing the static pressure in an air duct into a preset number of sections according to a preset rule, wherein section i among the sections corresponds to a static pressure range from P i -1 to P i and a gear corresponding to the section i, the gear corresponding to the section i corresponds to a rotating speed R i of a fan and a normal current range of [ I i ( P ( i)), I i ( P ( i -1))], wherein i ranges from 1 to N, and N is a positive integer; S2, making i = 1, selecting the section i, and detecting the gear corresponding to the section i, the rotating speed R i and an actual working current I i; S3, judging whether the actual working current I i is within the normal current range of [ I i ( P ( i)), I i ( P ( i -1))], performing S4 if yes, and making i = i + 1 and returning to S2 if no; S4, calculating a = I i − I i P i I i P i − 1 − I i, wherein I i is the actual working current, I i ( P ( i)) is a lower limit of the normal current range of [ I i ( P ( i)), I i ( P ( i -1))], I i ( P ( i -1)) is an upper limit of the normal current range of [ I i ( P ( i)), I i ( P ( i -1))], and a is a ratio of current differences in the section i; S5, selecting the section i + 1 from the sections, and detecting the gear corresponding to the section i + 1, the rotating speed R i +1 and the actual working current I i +1; S6, judging whether the actual working current I i +1 is within the normal current range of [ I ( i +1)( P ( i +1), I ( i +1)( P ( i))], determining the section i as a final section if no, and performing S7 if yes; S7, calculating b = I i + 1 − I i + 1 P i + 1 I i + 1 P i − I i + 1, wherein I i +1 is the actual working current, I ( i +1)( P ( i +1)) is a lower limit of the normal current range of [ I ( i +1)( P ( i +1)), I ( i +1)( P ( i))], I ( i +1)( P ( i)) is an upper limit of the normal current range of [ I ( i +1)( P ( i +1)), I ( i +1)( P ( i))], and b is the ratio of current differences in the section i + 1; and S8, determining the section i + 1 as the final section if a predetermined condition is satisfied, and determining the section i as the final section if the predetermined condition is not satisfied, wherein the predetermined condition is b ≥ 1 ≥ a or ( b ≥ 1 and a ≥ 1 and b > a). S1, dividing the static pressure in an air duct into a preset number of sections according to a preset rule, wherein section i among the sections corresponds to a static pressure range from P i -1 to P i and a gear corresponding to the section i, the gear corresponding to the section i corresponds to a rotating speed R i of a fan and a normal current range of [ I i ( P ( i)), I i ( P ( i -1))], wherein i ranges from 1 to N, and N is a positive integer; S2, making i = 1, selecting the section i, and detecting the gear corresponding to the section i, the rotating speed R i and an actual working current I i; S3, judging whether the actual working current I i is within the normal current range of [ I i ( P ( i)), I i ( P ( i -1))], performing S4 if yes, and making i = i + 1 and returning to S2 if no; S4, calculating a = I i − I i P i I i P i − 1 − I i, wherein I i is the actual working current, I i ( P ( i)) is a lower limit of the normal current range of [ I i ( P ( i)), I i ( P ( i -1))], I i ( P ( i -1)) is an upper limit of the normal current range of [ I i ( P ( i)), I i ( P ( i -1))], and a is a ratio of current differences in the section i; S5, selecting the section i + 1 from the sections, and detecting the gear corresponding to the section i + 1, the rotating speed R i +1 and the actual working current I i +1; S6, judging whether the actual working current I i +1 is within the normal current range of [ I ( i +1)( P ( i +1), I ( i +1)( P ( i))], determining the section i as a final section if no, and performing S7 if yes; S7, calculating b = I i + 1 − I i + 1 P i + 1 I i + 1 P i − I i + 1, wherein I i +1 is the actual working current, I ( i +1)( P ( i +1)) is a lower limit of the normal current range of [ I ( i +1)( P ( i +1)), I ( i +1)( P ( i))], I ( i +1)( P ( i)) is an upper limit of the normal current range of [ I ( i +1)( P ( i +1)), I ( i +1)( P ( i))], and b is the ratio of current differences in the section i + 1; and S8, determining the section i + 1 as the final section if a predetermined condition is satisfied, and determining the section i as the final section if the predetermined condition is not satisfied, wherein the predetermined condition is b ≥ 1 ≥ a or ( b ≥ 1 and a ≥ 1 and b > a).