Cement lifting device for building wall on construction site

The utility model discloses a cement lifting device for building a wall on a construction site, which relates to the field of cement lifting on the construction site and comprises a device main body, a fixed column is fixed in the middle of the top of the device main body, a bidirectional synchronous motor is mounted at the top of the fixed column, and the output end of the bidirectional synchronous motor is respectively connected with a first rolling plate and a second rolling plate. By arranging the bidirectional synchronous motor, the first winding plate, the second winding plate, the lifting rope, the placing plate and the fixing groove, when the device main body is used, an external power supply is firstly switched on, then a cement barrel is placed in the fixing groove of the placing plate, and after the cement barrel is placed stably, the bidirectional synchronous motor is started; the bidirectional synchronous motor drives the first winding plate and the second winding plate to rotate, after the first