The invention discloses an operation shadowless lamp which comprises a cantilever and a lamp holder. The cantilever is made of alloy steel, one end of the cantilever is fixed on a ceiling, and the other end of the cantilever is connected with the lamp holder through a buckle. The lamp holder comprises a lampshade and a bottom plate. The bottom plate is provided with circular light-emitting holes which are evenly distributed, LED lights are installed inside the light-emitting holes, and diaphragms are arranged on the surfaces of the LED lights. A light guide plate is arranged inside the lampshade. Moreover, the light guide plate is used for diffusing and giving out light emitted by LED light sources on the side face after reflecting the light, so that emergent light is more even, the shadow problem in a projection area can be solved, and thus it is effectively guaranteed that operations can be performed smoothly. Expansibility is excellent, the design is novel, a good innovation scheme is realized, and the operation shadowless lamp has a good market promotion prospect.