The invention discloses a smart PAM dosing device. The device comprises a stirring barrel, a vacuum main machine and an automatic feeding machine, the center of the top of the stirring barrel is provided with a deceleration motor, the lower end of the deceleration motor is connected to a mixer blade inside the stirring barrel, the automatic feeding machine is arranged at the top of the stirring barrel, the automatic feeding machine is respectively connected to the vacuum main machine and a material cabin through a gas suction hose and a material suction hose, the automatic feeding machine is orderly provided with a feeding inlet, the material storage cabin and a feeding inlet from top to bottom, a vacuum controller is arranged between the feeding inlet and the material storage cabin, a frequency conversion speed regulating feeding valve is arranged between the material storage cabin and the feeding inlet, the bottom of the feeding inlet is communicated with the top of the stirring barrel, a feed diluting device is arranged at the top of the stirring barrel, the feed diluting device is connected to the automatic feeding machine, a water inlet pipe is arranged in one side of the feeddiluting device and the stirring barrel is connected to a PAM dosing screw pump through a discharge pipe.