The utility model discloses an intelligent security electric box convenient to fix. A fixed base is assembled at the bottom end of the assembled electric box shell; a rectangular groove is formed in the upper surface of the fixed base; the bottom end of the assembled electric box shell is inserted into the rectangular groove; a first clamping block on the rear wall of the assembled electric box shell is clamped in the first clamping groove; an extrusion block is inserted into the front end of the rectangular groove; a second clamping block on the rear wall of the assembled electric box shell is clamped in a second clamping groove of the extrusion block; limiting blocks are inserted into the front ends of the rectangular grooves, clamping devices are assembled between the limiting blocks and the rectangular grooves, the assembly type electric box shell and the fixing base are convenient to assemble and disassemble, the assembly type electric box shell is convenient to assemble and disassemble, the disassembled device is located on the rear side cover plate, and the device can be conveniently and directly detected. The split mounting type electric box shell is convenient to assembleon site, the situation that the whole assembled electric box is difficult to transport is avoided, the number of bolts used in the assembling process is greatly reduced, and the assembling trouble isreduced.