The invention discloses a spraying liquid density tester which comprise an electric control box, a liquid adding cup, a magnetic drive pump, a pressure frequency converter, a fluid flow controller, a pressure controller, a guide pipe, liquid vapor spraying nozzles, a test model, a turntable, a motor and an outer cover, wherein the liquid adding cup is sequentially connected with the magnetic drive pump, the pressure frequency converter, the fluid flow controller and the pressure controller from left to right; the pressure controller is connected with one end of the guide pipe; the other end of the guide pipe is connected with the liquid vapor spraying nozzles; the liquid vapor spraying nozzles are arranged in the inner wall of the outer cover; the turntable is arranged at the bottom of the outer cover; the motor is arranged in the turntable; the test model is arranged on the turntable; the electric control box is connected with and is used for controlling the motion of the magnetic drive pump, the pressure controller, the liquid flow controller, the pressure controller and the motor; and a timer is arranged in the electrical control box. By adoption of the spraying liquid density tester, the test precision of protective clothing is improved, and a plurality of liquid vapor spraying nozzles are controlled at the same time by a programmable logic controller (PLC), so that synchronous action of the liquid vapor spraying nozzles is realized.