The invention relates to a load virtual synchronous machine control method, which comprises the following steps: respectively calculating a phase angle and a network side voltage amplitude of a load virtual synchronous machine based on network measurement related data; carrying out park conversion through the phase angle of the load virtual synchronous machine and pre-obtained network side three-phase voltage and current to obtain voltage and current under a rotating coordinate system; and performing double closed-loop control and inverse Park conversion based on the voltage amplitude of the load virtual synchronous machine and the voltage and current under the rotating coordinate system to obtain a three-phase modulation wave signal, and controlling the on-off of a switching tube in the load virtual synchronous machine according to the three-phase modulation wave signal, wherein the double closed loops comprise a current loop and a voltage loop. According to the technical scheme provided by the invention, the voltage loop is added, so that the problem that the output characteristic of the voltage is not ideal enough is solved, and the dynamic performance of the load virtual synchronous machine is improved.