The utility model relates to a farming auxiliary device's technical field especially relates to an insect -attack prevention pesticide sprinkler, and it can carry out inside and observe to improve and use the reliability, and can carry out height and spray angle and adjust, improve adaptability, and can promote to use, more convenient and practical, including placing case and shower nozzle, the inside of placing the case is provided with and stores the chamber, is provided with feed inlet and discharge opening on placing the case lateral wall, places the roof end and is provided with the discharge gate, still includes the frame, places to be provided with on the case lateral wall and observes the hole to be provided with transparent baffle observing hole department, still including roof, bottom plate, left -hand thread pipe, left -hand thread pole, right -hand thread pipe, right -hand thread pole, connecting flexible pipe, communicating pipe, going up limiting plate and lower limit plate, the gasket -mounted is on the top of placing the case, and bottom plate top left side and right side are provided with left standing groove and right standing groove respectively to be provided with left ball bearing and right ball bearing respectively in left standing groove and right standing groove.