A stepless speed control method of all-electric kitchen waste truck top-mounted equipment includes the steps: when an all-electric kitchen waste truck operates in a top-mounted equipment mode, a power takeoff engages a gear, a drive motor operates at default target speed, and an output signal from a speed control switch for regulating the target speed of the drive motor is received in real time; after the output signal from the speed control switch is received, whether or not the output signal from the speed control switch is judged; if yes, the drive motor operates at the target speed matching with the output signal from the speed control switch; if the output signal from the speed control switch is not received, the drive motor operates at the default target speed. The speed control switch is a stepless speed control switch. The stepless speed control method of all-electric kitchen waste truck top-mounted equipment has the advantages that operating speed of the drive motor can be adjusted anytime according to the different power taking requirements when the top-mounted equipment executes actions, secondary pollution caused by sputtering and leakage of the waste due to excessively high tipping speed of a waste bucket is prevented, and operating efficiency of the truck is improved.