The invention provides a kitchen waste disposal control method and system, wherein the kitchen waste disposal control system comprises a switch function module, a motor function module, a valve function module, an analog function module, a controller function module and a sequence control function module. The combination of the function modules is used for achieving conveying control, sorting control, primary crushing control, pulping sieving control, riffling control and three-phase separation control. The kitchen waste disposal control system may solve control problems of long kitchen waste disposal production line, excessive equipment failure points, and inconvenience in manual operation, and is high in reliability and good in anti-interference ability.