Concrete mixer

The utility model discloses a concrete mixer and relates to the technical field of concrete mixing. The concrete mixer comprises a mounting box and a processing assembly, and a tow bar is fixedly mounted on the outer side of the mounting box. According to the concrete mixer, by controlling starting of an air cylinder, a telescopic rod pushes a moving block to move on a guide rail, a mounting cylinder is made to incline, concrete is conveniently discharged, the labor burden is reduced, separation of a hasp and a buckle is reduced, the concrete in the mounting cylinder is discharged, and the concrete mixer is simple in structure, convenient to use, high in practicability and convenient to popularize. By controlling starting of a motor, a stirring rod stirs concrete in a mounting cylinder, the working efficiency is improved, concrete caking is reduced, residues on the inner wall of the mounting cylinder are scraped by a scraper, the production cost is saved, starting of a water pump is controlled, a spray head s