Filter cartridge, forming device of base cartridge part and forming method of base cartridge part

The invention relates to a filter cartridge, a forming device of a base cylinder part and a forming method of the base cylinder part, the forming device comprises a mold, the mold comprises a cylindrical base mold, a stop plate and a tensioning component, the cylindrical base mold comprises an inner cylinder and an outer cylinder which are connected, a liquid leakage cavity is formed between the inner cylinder and the outer cylinder, the cylinder wall of the inner cylinder is provided with a liquid leakage hole, the liquid leakage hole is communicated with the liquid leakage cavity, and the tensioning component is connected with the stop plate; a containing cavity is formed in the inner side of the inner barrel and used for arranging a reinforcing rib cage, one end of the reinforcing rib cage can be connected with the barrel-shaped base mold, the other end of the reinforcing rib cage can be connected with a stopping plate through a tensioning part, the stopping plate is fixed to the barrel-shaped base mold, a