Based on radiosonde data, macro records, FY2 satellite data, radar data, etc., the effect of Aircraft Artificial Precipitation Enhancement on May 3, 2018 is analyzed by using multi-parameter dynamic contrast method. Four steps are included: rationality analysis of operation, analysis on operation catalyst diffusion, caculation of the operation-influenced area, and selection of operation comparison area, The results show that the change trend of radar echo K value in the influenced area and the K value of surface hourly rainfall increases first and then decreases after 3 hours of operation. The effect made after operation indicates that the effect test method is suitable for aircraft precipitation enhancement in Guizhou.