Serpentine arm robot is a continuous robot with (24 + 1) degrees of freedom independently developed by SIASUN Company. It is mainly used in narrow space and harsh environment. It can accomplish a variety of complex operations with different tools, such as drilling in narrow environment of Wing-rib compartment of aircraft, overhaul of cooling pipeline of nuclear power plant reactor, surveillance of military targets across visual field obstacle, search and rescue operation of trapped personnel in earthquake scene, etc