The invention discloses a micro-channel vapor chamber with a recess structure. The micro-channel vapor chamber comprises a bottom plate, a capillary core and a cover plate, a concave cavity is formedin the upper surface of the bottom plate, the capillary core is arranged in the concave cavity, a micro-channel structure is machined on the upper surface of the cover plate, concave cavity structuresare arranged on the two sides of the inner surface of the micro-channel structure, the bottom plate and the cover plate form a closed cavity in a welding mode, and the micro-channel vapor chamber with the concave cavity structures is formed through vacuumizing liquid injection. The micro-channel array with the concave cavity structure is adopted to replace a conventional condensation end liquid suction core structure, so that transmission and uniform distribution of a working medium are facilitated, the condensation area of the working medium is increased, a condensation backflow path is shortened, and lower flow resistance and excellent dryout resistance are achieved; and the concave cavity structure can increase the heat transfer area, can generate a jet throttling effect, can disturb steam flow, can inhibit formation of a condensate film, can promote condensation reflux and can increase the anti-dryout limit, so that the heat transfer efficiency is improved.