Abstract: Selecting tomato for greenhouse cultivation，according to prevention and control of tomato downy mildew，precision electric powder grinder and electric sprayer were chosen to carry out pesticide application，a comparative experiment of control efficiency and pesticide utilization rate was carried out，performance of precision electric powder grinder and electric sprayer were compared and verified，and highly effective plant protection equipment suitable for greenhouse spraying was selected.After testing，precision electric powder grinder compared with electric sprayer，pesticide utilization rate increased by 31.7%，spraying efficiency increased by 20 times，and control effect increased by 13.2%.