An automatic device for simultaneously measuring gas film field multi thermal parameters was developed and the design pinciple of mechanical shell,circuit and program were described.The measurement system consisted of mechanical shell with principle of gas film thickness adjustment module and pressure bearing module designed separately,control system with STM32F407 MCU based on Cortex-M4F kernel and program with PC and single chip,having advantages such as high automation level and high measuring accuracy.With the experimental conditions of 6 and 10 μm gas film thickness and 0.3,0.5 and 0.8 MPa supply pressure,the temperature and pressure parameters of gas film from double U type plane aerostatic throttle were measured and analyzed.Experimental results show not only with the increase of supply pressure and gas film thickness,the temperature of gas film from double U type plane aerostatic throttler is decreased,and the pressures are increased and decreased respectively,but also the gas film temperature from double U type plane aerostatic throttler appears drop phenomenon at the notches of aerostatic throttler and the pressure drops between notches and edge of aerostatic throttler but closer to notches when supply pressure and gas film thickness remains unchanged.