The invention discloses a control method for improving inverter current waveform quality. The control method comprises the steps of: step 1, detecting a load current; step 2, performing dq transformation on the load current for N times; step 3, performing low-pass filtering processing on a signal after N times of dq transformation so as to obtain a load N-times harmonic current; step 4, performingdq inverse transformation on the load N-times harmonic current for N times, wherein N is a positive integer; step 5, outputting a current after a current tracking control link; step 6, detecting N-thharmonic of the output current, subtracting the output current and the detected load N-times harmonic current in a dq coordinate system to obtain a deviation, and performing proportional integral control on the deviation; step 7, and adding the load N-times harmonic current after undergone proportional control to a proportional integral control result in the step 6 in the dq coordinate system soas to obtain a final instruction of the N-th harmonic, and outputting the final instruction to the step 4. The control method can basically eliminate errors caused by the current tracking control link, so that the APF output current is closer to an instruction current.