The utility model discloses a circulation pump test machine, it includes shower nozzle etc, spout head position in control panel left side, control panel and board leg joint, the heater, the thermocouple, the high speed agitator all is located the emulsion incasement, the heater is located the thermocouple right side, the high speed agitator is located between heater and the thermocouple, the emulsion case is located the circulating pump right side, the flowmeter, agitator motor is located emulsion case top, the flowmeter is located the agitator motor left side, agitator motor is located board support below, switch is located the temperature detect switch left side, temperature detect switch is located between switch and the circulating pump switch, the circulating pump switch is located between temperature detect switch and the pressure control switch etc. The utility model discloses can effectively reduce the usage space, can pass through the pressure adjustment, realize that the emulsion to the simulation of the clean nature influence of rolling mill under different shearing forces, reduces the emulsion box, can reduce the volume of the required sample of experiment, maintain the required electric quantity of emulsion temperature simultaneously and consequently reduce to practice thrift the cost.