The invention discloses an electric breaking-in tool for a crimping wire clamp. The electric breaking-in tool for the crimping wire clamp comprises a base, a clamping mechanism, a lifting mechanism and a cutting mechanism, wherein the clamping mechanism is arranged at one side of the base; the lifting mechanism is arranged at the other side of the base; the cutting mechanism is connected to the upper part of the lifting mechanism; the base comprises a bottom plate, clamping mounting plates, lifting mounting plates and a bevel gear mounting plate; the clamping mechanism comprises a slide bar, a fixed clamping block, a sliding clamping block, a screw rod and a clamping handwheel; the lifting mechanism comprises a driving bevel gear, a driven bevel gear, a lifting platform and a lifting handwheel; and the cutting mechanism comprises a cutting disk, a motor and a forward-backward mobile station. The invention further provides an operation method of the tool. By the electric breaking-in tool for the crimping wire clamp, the cutting depth and position can be accurately controlled; the breaking-in effect is good; the common problems that the wire clamp is not cut off due to deviating cutting and over-shallow cutting, a guide wire is cut due to over-deep cutting and the like in the prior art are solved; and meanwhile, the operation is simple, convenient and labor-saving, use is safe and the operation efficiency is high.