The impingement spray characteristics of diesel fuel were studied under different injection and environmental conditions, including injection pressure, ambient pressure, impingement distance, wall temperature and surface roughness. Through the experiment, the data of impingement spray radius R_W and suction height H_W after impingement were obtained and the influences of various parameters on R_W and H_W were evaluated. The results show that the effect of injection pressure on R_W is the most obvious, followed by the ambient pressure and the impingement distance. The most obvious factor for H_W is still the injection pressure, followed by the impingement distance and the ambient pressure.