The invention relates to a zero calibration method for an adjusting device for an antenna panel, which can solve the technical problem of low adjustment precision of the adjusting device caused by improper zero calibration way, and the adopted technical scheme is as follows: the zero calibration method is realized during the process of using the adjusting device to adjust the position of the antenna panel, the adjustment process can drive a lifting mechanism with the help of a stepping motor and a power transmission mechanism arranged on a main framework, a controller and matching software procedure, a support frame of the antenna panel arranged on the lifting mechanism can realize position adjustment of the lifting with the help of the lifting mechanism, a grating ruler with a grating groove, a first groove type optocoupler, a code wheel with the grating groove and a second groove type optocoupler are further arranged in the adjusting device, wherein the grating ruler and the first groove type optocoupler are arranged on the support frame, and the code wheel and the second groove type optocoupler are coaxial with a rotating shaft of the stepping motor, and initial zero adjustmentand precise zero adjustment are carried out under the conditions. The key of the zero calibration method is that a zero adjustment mechanism is increased in the adjusting device, thereby achieving the purpose of precisely adjusting zero position and improving the adjustment precision of the adjusting device.