A platform for testing the flow characteristics of industrial solenoid valve was designed, and the matching software was developed. The flow measurement range of the platform was 02~100 m3/h, the pressure difference measurement range between the inlet and outlet of the tested solenoid valve was 0~200 kPa, and the applicable caliber range of the tested solenoid valve was 3175~762 mm（1/8~3 inch）. According to the difference of the solenoid valve flow rate and caliber specifications, three workstations were designed for testing the flow coefficients and flow resistance coefficients of industrial solenoid valve. In the test of flow characteristic, it was found that the steady flow time set as 120 s was more reasonable. The measurement uncertainty of flow coefficient and flow resistance coefficient was calculated according to the calculation formula and data-collection method. The technical parameters of the platform conform to the standard JB/T 7352—2010, and it has been used in the third-party inspection of industrial solenoid valve products.