Aiming at the present conditions of the fast development of liquid fertilizer while the device of liquid fertilizer underdevelopment, a design of experimental platform to measure technical and parameters of liquid device was put forward. Based on this, the perpendicular rotating experiment has been done with liquid device experimental platform to make three factors return two times on the effect of shower nozzle flow. By way of treating and analyzing the test data, the density of liquid fertilizer, rotational speed of electric motor and the impact and relations of diameter of nozzle on flow volume of the nozzle were gained.