The invention relates to a high-precision short-wave transmitter power ALC control method, and the method comprises the following specific steps: S1, taking an attenuation value table and a referencevoltage AD value table generated during calibration as a reference table for power control during actual transmission; S2, querying an attenuation value table to find an attenuation value under a corresponding working frequency, and sending the attenuation value as an initial attenuation value to a numerical control attenuator in a power amplifier; S3, comparing the collected forward and reverse detection voltage AD values generated by the antenna modulation interface unit with AD values of corresponding working frequencies in a reference voltage AD value table to calculate a difference value;S4, calculating the detection power, if the detection power value is large, increasing the attenuation value of the numerical control attenuator, and if the detection power value is small, decreasingthe attenuation value of the numerical control attenuator step by step; and S5, slowly lifting and quickly dropping, and dynamically adjusting, so that the radio frequency output power is stabilizedat a constant value. The beneficial effects of the method are that the method improves the power calibration efficiency, reduces the manpower consumption, and guarantees the high-precision output of the power of a transmitter.