The utility model discloses welding equipment special for multiple guns of a P-type beam column clamp of a storage cross beam. The welding equipment comprises a machine base, two vertical lifting welding columns, a storage beam supporting frame, two column clamp workpiece fixing frames and two horizontal type horizontal-welding columns. Two welding heads doing lifting movement are arranged each lifting welding column. A horizontally-moving welding head is arranged on each horizontal-welding column. Two clamping air cylinders are arranged on the storage beam supporting frame. Cooling devices are arranged on the column clamp workpiece fixing frames. Six welding machines are arranged on the lower portion of the machine base and are connected with the welding heads on the lifting welding columns and the welding heads on the horizontal-welding columns respectively. Automatic one-time welding is carried out on the storage beam and the butt-joint positions of three faces of the column clamp abutting against the end of the beam through the six welding guns according to data at the same time, and work efficiency is greatly improved. Meanwhile, the welding heads are driven by a stepping motor to move, a control system is convenient and easy to operate, the equipment is simple and extremely practical, and the production investment cost and labor consumption are greatly reduced.