Self-propelled efficient plant protection machinery

The utility model relates to self-propelled efficient plant protection machinery which comprises a left support, a right support, a middle support, a supporting and retraction mechanism and a liquid storage device, wherein the middle support is fixedly arranged on a front large frame of a riding type rice transplanter, and the left support and the right support adopt the same structure and are connected to the middle support through the supporting and retraction mechanism. During pesticide spraying, the left support and the right support are opened to the plane position same with the middle support. After spraying is finished, the left support and the right support are retracted to two side faces of the rice transplanter. Fan nozzles (26) are arranged on the middle support, the left support and the right support, and a stretcher mist sprayer (27) is utilized to transport the pesticide in the liquid storage device to the fan nozzles (26). According to different heights of rice seedlings, the height of the midd