Fixing device for metal material welding

The utility model discloses a fixing device for metal material welding, and relates to the field of metal material machining. According to the technical scheme, the device comprises an operation table, the top of the operation table is slidably connected with two mounting plates, the tops of the mounting plates are fixedly connected with abutting plates, the interiors of the abutting plates are slidably connected with clamping plates used for clamping the outer side of the tubular metal material, and the multiple sets of clamping plates are distributed in a circumferential array mode relative to the circle center of the abutting plates; and one side of each clamping plate is fixedly connected with an anti-skid pad, the mounting plate is provided with a closing mechanism enabling the multiple sets of clamping plates to be closed, and the bottom of the mounting plate is fixedly connected with a T-shaped sliding block. And by adjusting the distance between the two abutting plates, the two abutting plates can abu