The utility model discloses a high-order analog N channel active band-pass filter with adjustable frequency. The band-pass filter comprises an active band-pass filter body. The active band-pass filter body is formed by M N channel filtering groups, 2(M-1) gyrators and a clock generator. Two paths of single-ended active filters form an integrated differential double-ended N channel active band-pass filter, and harmonic waves in even number order are eliminated. The gyrator is formed by an operational transconductance amplifier based on an inverter, and effectively increases gain of the filter. The clock generator is used to provide periodic sampling pulse sequences for the N channel active filter, so that center frequency of the filter is just determined by clock frequency. Through carrying out simulation on the sixth-order eight channel active band-pass filter, the variable range displayed in the simulation result is 0.2G to 2.0G, the active band-pass filter has wide adjustable center frequency. In addition, the active band-pass filter is characterized by good stability and low sensitivity, and is widely applied in the field of communication systems.