Gluing device

Provided is a gluing device (300), the gluing device (300) comprising: an outer shell (301), a first end (3011) of the outer shell (301) having a first opening (3012), a second end (3013) opposite to the first end (3011) having a glue injection hole (3014); the inner shell (302) is contained in the outer shell (301), one end, close to the first opening (3012), of the inner shell (302) is a third end (3021), a runner (306) is arranged between the inner shell (302) and the outer shell (301), and a glue outlet (303) is formed by the third end (3021) of the inner shell (302) and the opening face of the first opening (3012), so that glue flows to the glue outlet (303) from the glue injection hole (3014) through the runner (306). The gluing efficiency can be improved, and the processing cost is saved.