The invention provides a liquid flow frame for a liquid flow battery. The liquid flow frame includes a first shunt flow channel, a first transition flow channel, a second shunt flow channel and a second transition flow channel; the first shunt flow channel is arranged at one end of a reaction zone and communicates with the reaction zone, and a longitudinal cross-sectional area of the first shunt flow channel decreases gradually in a first direction; one end of the first transition flow channel communicates with one end, having larger longitudinal cross-sectional area, of the first shunt flow channel, and the other end of the first transition flow channel is provided with a first liquid port; the second shunt flow channel is arranged at the other end of the reaction zone and communicates with the reaction zone, and the longitudinal cross-sectional area of the second shunt flow channel decreases gradually in a second direction; one end of the second transition flow channel communicates with one end, having larger longitudinal cross-sectional area, of the second shunt flow channel, and the other end of the second transition flow channel is provided with a second liquid port, wherein the first direction and the second direction are opposite. According to the liquid flow frame provided by the invention, and with the shunt flow channels having the flow channel width decreasing gradually, the flow quantity and speed of an electrolyte solution flowing into the reaction zone are more homogenized, and the service life of electric piles is prolonged.