The invention discloses an LED project lamp using a lamp shell support as a mounting interface support structure. The LED project lamp comprises the lamp shell support (101) and LED bulbs (102), the lamp shell support (101) is a rectangular box with an opening on one surface, the surface opposite to the opening of the lamp shell support (101) is provided with a hole for mounting an extruded double-sided radiator (103), vent holes are arranged on the other surfaces of the lamp shell support (101) except for the surface with the opening and the surface with the hole, the lamp shell support (101) is fixedly mounted by fixing components arranged on two sides of the lamp shell support, and mounting surfaces for mounting the LED bulbs (102) are arranged on the extruded double-sided radiator (103). The LED project lamp is simple in structure, low in manufacturing cost and convenient to mount, use and maintain. The bulbs of the LED project lamp, a lighting fixture and a lighting control product can be respectively independent in production and use, production links of LED lighting products are greatly decreased, batch production is improved, and standard large-scale production and industrialization of the energy-saving LED lighting products are facilitated.