The invention discloses a correct method of power amplifier, comprising that randomly extracting a plurality of power amplifiers, according to TD-SCDMA standard, from -50dBm to 24dBm, while the step is 1dB, hand-operated correcting the APC control word relative to each emission power, recording the corrected APC control word to form a two-dimension matrix, based on the matrix, using Grubbs check method to screen data, using the data to form a reference curvature, using the curvature as reference, translating some to correct the power amplifiers. The invention can quickly and easily current power amplifier, with high accuracy, but without additional area and cost of TD-SCDMA system.