The invention discloses an intermittent type plain water fire extinguisher. The intermittent type plain water fire extinguisher comprises a base and a water tank, self-locking rolling wheels are arranged on the left side and the right side of the bottom of the base, the lower side of a motor is connected with a stirring rod through a motor shaft, a second carrying frame is disposed on the right side of a first carrying frame, a second rotating plug is disposed on the upper side of the second carrying frame, a carrying tray and a pull rod are disposed in the second carrying frame, a hydraulic pump is disposed at the bottom in the water tank, the right side of a first water pipe is disposed in a connecting pipe, a moving plate and a threaded rod are disposed in a sliding rail, the right sideof the connecting pipe is connected to a second water pipe through a pipe hoop, a bearing platform is disposed on the right side of a support plate, a support column is disposed in the bearing platform, and the top of the support column is connected to a moving block through a shaft rod. According to the intermittent type plain water fire extinguisher, the moving plate can be moved downward underthe action of the threaded rod and the sliding rail to control the opening and closing of water flow, so that intermittent water supply is completed.