The utility model discloses a relay protection test comprehensive supply box. The relay protection test comprehensive supply box comprises a box body and a box cover, a positioning base is arranged in the box body and is provided with instrument installation tanks with different volumes, the outer walls of the instrument installation tanks are matched with instruments in appearance, small pocket storage needle type connectors are formed in the box cover, large pockets are arranged at the bottom of the inner side of the box cover, small pockets are arranged on the upper sides of the large pockets, the large pockets are provided with large pocket covers respectively, the large pocket covers are connected with the large pockets through first snap-fasteners, the small pockets are provided with small pocket covers, the small pocket covers are connected with the small pockets through second snap-fasteners, and a whole set of test lines, an electrical tramegger and a single strand of test line are arranged in the instrument installation tanks respectively. The relay protection test comprehensive supply box integrates, centralizes and fixes related instruments and related tools, is convenient to carry and use and prevents related instruments and related tools from being missed and lost easily, the field work is orderly, and the work efficiency is improved.