The equipment is mainly used for the tightness test and functional test of product assembly and shell cavity in pressure regulating valve industry; the test system adopts man-machine interface system; customized high-performance PLC; high-precision IO data acquisition module; Yadeke and SMC pneumatic components; combination and call of parameter modularization; automatic sealing and sealing of workpiece cavity; air tightness through intelligent sensor module Performance testing module, flow detection module, voltage detection module, current detection module, etc. can intelligently judge the product test result data. The test results and data are stored through the man-machine interface, which is convenient for customers to analyze the product quality, and improve the follow-up traceability of products. The fixture is easy to operate, easy to replace, reduce labor intensity, greatly improve production efficiency and product quality;