Glue injection device

The utility model relates to the technical field of building construction equipment, in particular to a glue injection device which comprises a charging barrel and an injection barrel, a piston is movably arranged in the syringe, and a piston rod is connected to the piston; a partition plate is fixed to one side in the syringe, a glue injection cavity is formed in the right side of the partition plate, a communicating pipe is fixed to the partition plate, one end of the communicating pipe communicates with the outer side of the syringe, and the other end of the communicating pipe communicates with the glue injection cavity. A plurality of telescopic glue injection heads of different types are mounted on the rotating sleeve along an annular array, a plurality of through holes are formed in the rotating sleeve, and the through holes communicate with the inner sides of the telescopic glue injection heads correspondingly; the inner side of the injection barrel is communicated with a glue conveying pipe, the other