Concrete mixer for construction

The utility model discloses a concrete mixer for construction. The concrete mixer comprises a supporting plate and an angle adjusting mechanism, large bearings are symmetrically arranged on the upper surface of the supporting plate through a fixing base, a stirring barrel is fixedly connected between the inner walls of the two large bearings, spiral pieces which are evenly distributed are arranged on the inner wall of the stirring barrel, and a driving mechanism is arranged at the left end of the upper surface of the supporting plate and fixedly connected with the middle of the outer arc face of the stirring barrel. The driving mechanism comprises a motor, a gear and a gear ring, the motor is fixedly connected to the left end of the upper surface of the supporting plate through a support, the gear is arranged at the left end of an output shaft of the motor, the gear ring is arranged in the middle of the outer cambered surface of the stirring barrel, and the gear is in meshed connection with the gear ring; acc