Air pressure loading valve positioner test bed

The invention discloses an air pressure loading valve positioner test bed which comprises a vacuum control mechanism pneumatic executer, an air pressure loading system, a test pressure regulation component and a detection box, wherein the vacuum control mechanism pneumatic executer is matched with a tested valve positioner; the air pressure loading system is connected with an output end of the pneumatic executer and used for stimulating the working conditions of the controlled valve; the test pressure regulation component provides the test air pressure to the tested valve positioner; and the detection box is connected with the valve positioner. The air pressure loading system comprises a reverse executer and a load pressure regulation component, wherein the reverse executer is rotatably connected with the output end of the pneumatic executer; and the load pressure regulation component provides the loaded air pressure to the reverse executer. By adjusting the output pressure of the load pressure regulation component, the reverse torque of the reverse executer can be changed, and the change of the load acting on the output end of the pneumatic executer is realized. The air pressure loading valve positioner test bed disclosed by the invention has the advantages that: the air pressure loading system composed of reversely-used small executers is used for stimulating the working conditions of the load of the valve controlled on the site, so that the test conditions of the valve positioner are more close to the really-used actual environment.