Wire cutting mechanism for butt-welding machine

The utility model relates to the field of butt-welding machines, in particular to a wire cutting mechanism for a butt-welding machine, which comprises a transmission case, a transmission component and a tightness adjusting component are connected and arranged in the transmission case, a reciprocating cutting adjusting component is connected and arranged on the outer side of the transmission case, and a wire stripping supporting component is connected and arranged at the upper end of the transmission case. Through the use of the tightness adjusting assembly, the tightness of the transmission belt is convenient to adjust, the phenomenon of deviation caused by over-looseness of the belt is avoided, and the safety performance is improved; the reciprocating shearing adjusting assembly and the one-way motor are used, an original two-way motor is replaced by the single-phase motor, cost is reduced, and meanwhile the situation that the service life of the belt is affected by frequent forward and reverse rotation is a