The invention relates to a disposable medical edge tool box. The disposable medical edge tool box comprises a barrel and an upper cover assembly, wherein an oblique baffle which corresponds to a position below a feeding opening is arranged in a main cover; the oblique baffle comprises an annular mounting plate and a fan-shaped oblique plate which extends downwards obliquely; a top cover plate comprises a central disk, a U-shaped ring and an outer ring plate; an annular groove is formed in the back surface of the outer ring plate; the annular mounting plate is embedded in the annular groove andis limited and fixed by a limiting thin plate at an annular groove opening; a screw cap comprises an outer ring body and a central disc with a through opening; a cavity which allows the outer ring body to extend into the annular opening is formed in the back surface of the central disc; the edge of the outer ring body is provided with arc-shaped toothed plates and toothed grooves among the adjacent toothed plates; a plurality of limiting heads are arranged on the outer periphery side of an opening of the U-shaped ring; gaps which allow the toothed plates at the edge of the outer ring body topass through are formed among the adjacent limiting heads; and the toothed plates at the edge of the outer ring body can drop on a position below the limiting heads and are in limiting fit with the limiting heads. The risks that the edge tool box is knocked over and edge tools drop out are reduced or avoided. The disposable medical edge tool box has the advantages of simple structure, low cost, safety and reliability.