In order to clarify the influence of temperature, humidity and air pressure on the verification environment for the wind speed sensor, According to "JJG4312014 Portable 3cup anemometers" verification the speed sensors, through the formula for computing the standard wind speed analysis of air temperature, humidity and air pressure changes before and after verification on the result of test, the calculated by weighted calculation method verification of temperature, humidity and air pressure in the process of their weight, through experiment, the experimental results show that through the analysis and research on the influence of temperature, humidity and air pressure values on the wind speed standard , the wind speed sensor calibration accuracy is increased significantly, reduce the uncertainty of measurement.