The invention relates to the technical field of robots, and aims to provide an amphibious robot with good mobility, low manufacturing cost, small size and wide application range. The amphibious robotcomprises a vehicle body and at least four wheel-leg composite mechanisms arranged on the two sides of the vehicle body, wherein the wheel-leg composite mechanisms comprise composite wheels with hollow inner parts and supporting legs, the axial direction of the supporting legs is perpendicular to the axial direction of the composite wheels, the upper parts of the supporting legs are rotatably connected with and communicate with the axial center of the composite wheels, the composite wheels are driven by wheel drive assemblies, the supporting legs are driven by leg drive parts, impellers are arranged in the composite wheels, water inlets are formed in the outer sides of the composite wheels, and water outlets are formed in the bottoms of the supporting legs. Through the amphibious robot, the problems that an existing amphibious robot is complex in structure, high in manufacturing cost and large in size, is not suitable for working in narrow space and is small in application range are solved.