Lithography light source lamp with light supplementing function

The utility model provides a lithography light source lamp with a light supplementing function, and belongs to the technical field of illumination light sources. The device comprises a shell, a lithography light source assembly, a light supplementing plate, a condensing lens and a light diffusing piece, the shell is of a square frustum structure, openings communicated with an inner cavity are formed in the top and the bottom of the shell, the lithography light source assembly is annularly arranged on the inner wall of the top of the shell, the lithography light source assembly comprises a circuit board and LED lamps, and the LED lamps are arranged below the circuit board in an equidistant array mode. The light supplementing plate is pasted and fixed to the inner wall of the shell, the condensing lens is arranged in the shell and located below the LED lamp, the section of the condensing lens is in a trapezoid shape, the light scattering piece is embedded in the bottom of the shell, and the bottom of the light