The invention discloses a sand washing machine for water conservancy equipment production. The sand washing machine structurally comprises an efficiency improving box, a supporting bracket, a rotatingdisk, a motor, a motor cover shell, a rotating bracket disc, an impeller and a reducer. According to the sand washing machine for water conservancy equipment production, water impact force generatedby the impeller drives a transmission mechanism and a rotating mechanism to move, the very good buffer effect on the generated water impact force is achieved, and thus a movable bottom plate repeatedly rises and falls through a hydraulic device; source power is provided for a sliding mechanism through back and forth movement of the bottom plate, the generation effect of a generation device is further achieved, a power source is provided for a hybrid pressure device, and finally the water inlet and sand inlet speeds are increased; and after mixing, the efficiency of cleaning work is improved, thus sand and stone remaining materials deposited on the bottom plate can be further cleaned to be utilized, the stability of the sand washing machine is improved, and unnecessary energy waste is reduced.