Positioning tailor-welding tool for civil air defense construction door

The utility model discloses a civil air defense construction door positioning tailor-welding tool, which relates to the field of tailor-welding of civil air defense construction doors and comprises a workbench, a fixing device is arranged at the top end of the workbench, and the fixing device comprises a shell, an inserting column, a dismounting button, a limiting column, a reset spring, a clamping block, a rotating shaft and a torsional spring. The shell is located at the top end of the workbench, the insertion column is fixed to the bottom end of the shell and extends into the workbench, the disassembly button is located at the top end of the shell and penetrates into the insertion column, the limiting column is located in the insertion column, and the reset spring is connected to the outer wall of the limiting column in a sleeving mode. By arranging the fixing device, the steel plate can be stably erected on the surface of the workbench, and different from a traditional hand-held mode, manpower input for a