Auxiliary assembling mechanism for bicycle lamp

The invention relates to the technical field of bicycle lamp production, in particular to a bicycle lamp auxiliary assembling mechanism which comprises a rack. The fixing seat is arranged on the rack and used for placing the lamp shell, and the abutting assembly is arranged on one side of the fixing seat and used for abutting the lamp shell against the fixing seat; the pneumatic clamp assembly and the abutting assembly are oppositely arranged on the rack, the pneumatic clamp assembly comprises a clamp body and a first power piece, and clamping fingers of the clamp body penetrate through the fixing base, extend into the lamp shell and are located below the blind rivet on the soft rubber plug; and the ultrasonic welding head is vertically arranged on the rack in a sliding mode, the ultrasonic welding head is located above the fixing base, and a second power piece used for driving the ultrasonic welding head to vertically move is arranged on the rack. According to the lamp shell assembling device, a worker only