The invention discloses a redistributor which is used for full exchange of gas phase and liquid phase of phosphorus trichloride gas and phosphorus washing solution. The redistributor is characterized by mainly comprising a bottom plate (1), a V-shaped plate cap (3), a cofferdam ring (5) and phosphorus washing solution weir troughs (8), wherein the cofferdam ring (5) is arranged around the bottom plate (1); a plurality of phosphorus washing solution weir troughs (8) are arranged in the cofferdam ring (5); the V-shaped plate cap (3) which is arranged along the same direction as phosphorus washing solution weir troughs (8) is arranged above the phosphorus adjacent washing solution weir troughs (8); the edge of the V-shaped plate cap (3) covers the phosphorus washing solution weir troughs (8); and the phosphorus washing solution weir troughs (8) are provided with ventilation holes (7). The redistributor can make that the gas phase and the liquid phase are fully contacted with each other and overcome the disadvantage that fine particulate matter and free phosphorus can enter the finished product of phosphorus trichloride liquid along the wall of a phosphorus washing tower or enter the finished product after being entrained by gas and then condensed by a condenser.