In order to improve the detection efficiency of the pressure-controlled anti-spray valve, TRIZ theory was applied to analyse and optimise the design of the pressure-controlled anti-spray valve detection pressure setting and detection experimental device. Using the TRIZ theory innovation method, by determining the system contradiction of the experimental device of pressure control anti-injector valve, clarifying the engineering parameters that need to be solved by the experimental device, finding the inventive principles to solve the corresponding problems according to the Achschuler contradiction matrix, and determining the application of the corresponding inventive principles in combination with the experimental device. Through the TRIZ theory analysis tool to determine the design of the experimental device of pressure-controlled anti-spray valve, and conduct indoor pressure experiment. The experimental results show that the experimental device of pressure-controlled anti-spray valve can meet the requirements of sealing (≥ 30 MPa) and pressure strength (1–30 MPa) under the simulated on-site construction pressure conditions, and improve the regulating efficiency by more than 60%. The successful development of this device can provide a reference for the effective evaluation of the performance of the pressure-controlled blowout prevention valve and the reasonable regulation of the switching differential pressure.