Concrete mixer complete in feeding

The invention discloses a concrete mixer complete in feeding. The concrete mixer comprises a mixer body, a screw feeding device and a flow electromagnetic valve. The screw feeding device is arranged on the upper side of the mixer body. A first screw blade and a second screw blade are arranged in the screw feeding device from left to right. A water inlet is formed in the upper portion of the right side of the mixer body. According to the concrete mixer complete in feeding, through the screw feeding device, forced feeding is guaranteed and meanwhile raw material mixing is more sufficient and uniform; by means of the flow electromagnetic valve, quantitative water feeding can be guaranteed, and the quality of the concrete mortar obtained through mixing of the mixer is guaranteed; a screw rotation device at the bottom of the mixer is driven by a forward and reverse motor, during reverse rotation, bottom materials are mixed, during forward rotation, continuous discharging is achieved, and the mixing effect and work