Pressure maintaining jig

The utility model discloses a pressure maintaining jig. The pressure maintaining jig comprises an upper module and a lower module. The upper die set comprises an upper die base, a clamping assembly assembled on the upper die base and a pushing assembly assembled on the upper die base. The lower die set comprises a lower die base, a positioning seat assembled on the lower die base and a pressure maintaining assembly assembled on the lower die base through a guide mechanism. A positioning mechanism is arranged between the upper module and the lower module; the upper die set and the lower die set move relatively in the first direction to achieve die assembly, and in the die assembly process, the positioning mechanism guides movement between the upper die set and the lower die set; the pushing assembly pushes the pressure maintaining assembly to move towards the positioning base in the second direction, and the second direction is perpendicular to the first direction, so that the pressure maintaining jig enables