The invention relates to a search-and-rescue robot, in particular to a small search-and-rescue robot with the function of cutting off a barrier. The small search-and-rescue robot solves the problems that most existing cutting robots or most existing cutting manipulators are hard to move and large in size and cannot work on an occasion where space is narrow and complex, and all members of the cutting manipulators are stable in relative position. The small search-and-rescue robot comprises a cutting manipulator, a mobile trolley, a mobile telescopic mechanism and a cutting tool; the cutting manipulator comprises a cutting hand, a small arm and a big arm; the mobile trolley comprises a trolley shell and a trolley body mobile part, and the trolley shell is a rectangular box with an opening in one end; the cutting tool is fixedly installed at one end of the cutting hand, the other end of the cutting hand is connected with one end of the small arm, and the other end of the small arm is in rotating connection with the big arm; the big arm is fixedly installed on the mobile telescopic mechanism; the mobile telescopic mechanism and the big arm are both arranged in the trolley shell through the opening of the trolley shell; the trolley body mobile part is fixedly installed on the trolley shell. The small search-and-rescue robot with the function of cutting off the barrier is used in a complex and severe cutting environment.