The spraying operation of single-layer seedbed seedling cultivation is generally carried out manually,with a few applying hanging type automatic spraying systems.However,manual spraying has problems such as high labor intensity,high injury,low efficiency,and poor quality.The hanging type automatic spraying system has problems such as not being able to cross the shed,repeated investment,occupying a large space,and blocking light.Therefore,a dedicated edge type automatic spraying vehicle for single-layer seedbeds that can cross the shed has been designed and developed.This equipment detects the edge position of the seedbed through infrared distance sensors,as well as the real-time deviation angle of the steering wheel and the inclination angle of the entire vehicle through high-precision angle sensors.Then,the control system calculates the target deviation angle of the steering wheel,which is controlled by the deviation correction actuator to achieve automatic deviation correction and guidance.It automatically travels back and forth along the edge of the seedbed and completes spraying operations during the walking process.