Electrode frame with flow channel section area changing in gradient mode along with distance length of liquid inlet and outlet

The utility model discloses an electrode frame with a flow channel cross-sectional area changing in a gradient manner along with the distance length of a liquid inlet and a liquid outlet, which comprises an electrode frame body, and the electrode frame body is provided with a first through hole, a second through hole, a third through hole, a fourth through hole, a shunt flow channel and a confluence flow channel; the shunting flow channel comprises a first-stage shunting flow channel and a second-stage shunting flow channel communicated with the first-stage shunting flow channel, the first-stage shunting flow channel is connected with the first through hole or the third through hole, and the second-stage shunting flow channel is connected with the positive electrode inlet or the negative electrode inlet; the confluence flow channel comprises a first-stage confluence flow channel, a second-stage confluence flow channel communicated with the first-stage confluence flow channel and a third-stage confluence flow