The invention discloses an intelligent fish and shrimp feeding unmanned vehicle system and an obstacle avoidance and displacement deviation correcting method of a vehicle body. According to the method, a trolley master controller is utilized for moving according to position of a GPS module, ultrasonic radar is used for carrying out obstacle avoidance and shifted rail correction, and finally fish food is quantitatively and uniformly scattered at fixed points in the moving process. According to the intelligent fish and shrimp feeding unmanned vehicle system and the obstacle avoidance and displacement deviation correcting method of the vehicle body, feeding can be carried out regularly and quantitatively with in a fixed range, and therefore the advantages of saving labor force, reducing the labor intensity of breeders, being reasonable in feeding, saving feed, reducing the breeding cost and increasing benefits are achieved.