Cathode connecting device of multi-path welding machine

The utility model provides a multi-path welding machine cathode connecting device which comprises a support, a conductive block, a locking part and a driving part, the support comprises a first clamping arm and a second clamping arm, the first clamping arm and the second clamping arm are oppositely arranged, and the first clamping arm and the second clamping arm are arranged in the first direction; the conductive block is located between the first clamping arm and the second clamping arm and fixed to the first clamping arm, and the conductive block is provided with a cable fixing structure; the locking part is located between the conductive block and the second clamping arm and can move relative to the conductive block in the first direction, and a gap used for clamping a workpiece to be welded is formed between the locking part and the conductive block; the driving part is arranged on the second clamping arm and used for adjusting the position of the locking part in the first direction when acting. 本申请提供有一种多