This paper introduces a kind of assembling machine for automobile backlight unit.The equipment mainly pastes the base plate fixing glue and the two-dimensional code label on the opposite side of the metal backplate,then the reflective fixing glue,the reflecting sheet,the light guide plate fixing glue,the light guide plate and the film material fixing glue are assembled on the front of the metal back plate.This paper describes the research and development background,working principle,structural characteristics and several key technologies of the equipment,which effectively improves the assembly stability of the equipment and the quality of the backlight,the utility model improves the production efficiency of the equipment and the market competitiveness of the products.