End pole plate frame, end pole plate and electrolytic bath

The utility model provides an end polar plate frame, an end polar plate and an electrolytic bath. The end pole plate frame comprises a pole frame body, and the pole frame body comprises a plate body, and an outer ring structure and an inner supporting structure which are arranged on the same side of the plate body in the thickness direction; the inner supporting structure is arranged on the inner side of the outer ring structure in the mode that the calibration end is connected with the outer ring structure, and the inner supporting structure and the outer ring structure jointly form an outer groove. The inner supporting structure is provided with an inner groove, and the outer ring structure is provided with a first liquid inlet channel and a first liquid outlet channel. The first liquid inlet channel is communicated with the inner groove and used for allowing electrolyte to flow into the inner groove, and the first liquid outlet channel is communicated with the outer groove and used for allowing the electro