The invention discloses an automatic LED lamp assembly device, the structure of which includes an organism, a controller, a rotating platform, a disc, a pre-pressing mechanism, an LED lamp body placement cylinder, a glue dispensing mechanism, a manipulator, and a lampshade placement frame 1. Unloading the lamp board, the controller is fixed on the body, the side of the controller is provided with the lamp board connected with the body, and after the lamp board is removed, there is a manipulator connected with the body and a lampshade placement frame. Compared with the prior art, this The effective effect of the invention lies in that the present invention places the LED lamp body by using the LED lamp body placement cylinder composed of cylinder body, support ring, LED lamp body support mechanism, transmission gear, adjustment mechanism and other components, which can be adapted to different specifications and models. For the placement of the LED lamp body, when it is necessary to assemble LED lamps of different specifications and models, there is no need to replace the placement tube, and it is only necessary to adjust the position of the LED lamp body support mechanism to adapt. The adjustment is simple and the adjustment efficiency is high.