The invention relates to an electric cabinet with fixing sheets capable of shrinking fixing space. Convex blocks are arranged on two sides of a bottom plate; grooves are formed in the convex blocks; baffles are arranged on the sidewalls of the grooves; wire inserting slots are formed in the grooves; multiple fixing sheets are arranged on the wire inserting slots; connecting sheets are arranged at the end parts of the wire inserting slots; the end parts of the connecting sheets are connected with a clamping structure which is provided with sliding blocks; through grooves are formed in the sliding blocks; a groove I is formed inside each fixing sheet; a spring I is arranged at the bottom end of each groove I; the end part of each spring I is connected with a clamping block by virtue of a connecting block; a spring II with the axial direction vertical to the that of each spring I is arranged in the cavity of each clamping block; the other end of each clamping block is provided with a handheld block; one end, matching with each fixing sheet, of each handheld block is set as a step. The electric cabinet with the fixing sheets capable of shrinking the fixing space overcomes the problems that the fixation operation of the wire inserting grooves of an existing electric cabinet is troublesome, and the size of a gap formed between the fixing sheets on each wire inserting groove and used for fixing a wire cannot be adjusted.