The utility model relates to an electric locomotive roof insulator cleaning machine. The cleaning machine comprises a rack, a liquid storage tank, a cleaning chamber, a mechanical chamber, an electriccontrol box, a control panel and a water level alarm device, the cleaning chamber is located in the middle of the mechanical chamber, four linkage rotating mechanisms, a brush rotating mechanism, a spraying mechanism, a roller linear guide rail and a safety door are arranged in the cleaning chamber, the brush rotating mechanism is perpendicularly installed in the center of the cleaning chamber, the spraying mechanism is fixedly installed on the two sides of the linkage rotating mechanism, and the brush rotating mechanism is fixed to the roller linear guide rail. An alternating-current motor,a spraying pump, a rinsing pump, a pushing cylinder and a door cylinder are arranged in the mechanical chamber, the brush rotating mechanism is connected with the alternating-current motor through a transmission shaft, the spraying mechanism is connected with the spraying pump and the rinsing pump, the roller linear guide rail is fixedly installed at the end of the pushing cylinder, and the spraying pump, the rinsing pump and the cleaning chamber are communicated with the liquid storage tank. The machine can achieve synchronous, automatic and efficient cleaning of four insulators at a time.