The invention provides a medical assistance light source device which comprises a flashlight body, a light bulb and a condensation cover. The light bulb is connected on the top of the flashlight body; the condensation cover covers the light bulb; the bottom of the condensation cover is sealed with the flashlight body; a focusing reflector covers the top of the condensation cover; a radiating groove is formed in the inner cover body wall of the condensation cover; and the radiating groove is a through groove. The reflector is arranged on the inner cover body wall, corresponding to the position of the radiating groove, of the condensation cover. A reflective baffle is connected with the outer cover body wall of the condensation cover in a hinge mode. One limitation rotating position of the reflective baffle can cover the radiating groove, and the included angle between the other limitation rotating position of the reflective baffle and the plane where the outer cover body wall is located is an acute angle. According to the design of the condensation cover, the requirement of one illumination source corresponding to a plurality of illumination directions is met, and meanwhile the trouble that a user carries a great deal of illumination equipment in the actual operation process is relieved due to the function of multi-directional illumination of the condensation cover.