Abstract: In the field of modern industrial automation, small handling robots serve as core equipment for material transportation, and their flexibility and efficiency exert a direct impact on the overall operation efficiency of production systems. Conventional handling equipment often suffers from poor adaptability and insufficient control accuracy when operating in narrow spaces. To address these drawbacks, this paper designs a small four-wheel-drive handling robot. By comparing the advantages and disadvantages of tracked and trackless handling technologies, a Mecanum wheel omnidirectional movement scheme is ultimately adopted. Combined with an STM32 single-chip microcomputer control system and infrared sensing technology, this scheme enables precise positioning and obstacle avoidance of the robot. This paper elaborates on the key design points of the traveling device and lifting mechanism, and conducts strength checks on critical components, aiming to provide references for the research and development of miniaturized intelligent handling equipment.