PCB and shell welding tool

The utility model provides a PCB and shell welding tool. The PCB and shell welding tool comprises a bottom plate, a shell and an upper plate which are sequentially arranged from bottom to top. The positioning pins are mounted on the bottom plate through sunk screws, and each end of the shell is fastened in the mounting groove of the bottom plate through round head screws; wherein a PCB (Printed Circuit Board) is placed in the shell; the upper plate is inserted into the positioning pin; the upper plate is fixed on the bottom plate through the inner hexagonal round head screws and the nut elastic flat gaskets, and a plurality of observation openings and positioning compression screw holes are formed in the top of the upper plate; and the support pillars are matched with the positioning and pressing screw holes. The welding state can be observed at any time through the observation opening; the pressure can be continuously adjusted through the top column, the defective product rate of welding of the PCB and the s