The invention discloses a modular reconfigurable snakelike robot, and relates to a snakelike robot. The problems that an existing snakelike robot has reverse tooth spaces and is small in driving force, long in control period, poor in control precision and not compact in structure are solved. The reconfigurable snakelike robot is formed by connecting a series of modular joints end to end. Every two adjacent modular joints are spaced by 90 degrees and are electrically connected in a spring-contact pin mode. The modular joints can achieve single-joint rotating motion in the way that a brushless DC motor drives a harmonic reducer, and the advantages of structural modularization, configuration compactness, high carrying capacity and the like are achieved. The snakelike robot can achieve separation at the adjacent joints in different working environments, and thus can be configured into two or more snakelike robots. In a similar way, two or more snakelike robots can be configured into one snakelike robot. The modular reconfigurable snakelike robot is suitable for the fields of pipeline detection, disaster relief, aerospace planet surface detection and the like.