Electrolytic bath sealing assembly and electrolytic bath

The electrolytic bath sealing assembly comprises a pole frame body and an outer sealing piece, an inner frame hole is formed in the middle of the pole frame body in a penetrating mode, the two end faces of the inner frame hole are an anode side and a cathode side respectively, and the anode side is concaved downwards around the periphery of the inner frame hole to form a limiting step face allowing a membrane electrode assembly to be arranged in. A water inlet and outlet hole and a hydrogen outlet hole are further formed in the outer side of the limiting step face of the electrode frame body, a first flow guide groove is formed in the position, between the water inlet and outlet hole and the limiting step face, of the anode side, a second flow guide groove is formed in the position, between the hydrogen outlet hole and the inner frame hole, of the cathode side, and outer sealing pieces are arranged between the anode side and the bipolar plate and between the cathode side and the bipolar plate. The electrode f