The invention relates to an air-ground amphibious robot, belongs to a bionic shape air-ground amphibious robot device. A ground walking device is fixedly connected with a flight device. The air-ground amphibious robot has the benefits that the air-ground amphibious robot has high obstacle crossing capacity and through capacity, meanwhile, has flight capacity, and mainly comprises the advantages that firstly, bionic platform design is adopted, the stealthiness of the robot is convenient to guarantee when the robot carries out a task, the overall mechanical design size is small, and the appearance of the robot achieves bionic camouflage; secondly, an incomplete wheel structure with a bionic structure is adopted, and the through capacity of the structure is higher than that of wheel type and crawler type structures under the condition of light weight and the same size; thirdly, an automatic inclinator and coaxal sculls are simplified, the mechanical structure is simple and compact, the size is small, the weight is light, and the control is simple.