The embodiment of the invention belongs to the technical field of robot navigation, and relates to a robot small-space escape method. The method comprises the steps of executing a fixing step in an escape state of controlling a robot to escape, and locking and fixing one side of the sweeping robot by a fixed wheel of the robot; driving a driving wheel opposite to the fixed wheel to rotate so as to drive the robot to rotate by taking the fixed wheel as a circle center; detecting collision, and if the collision occurs in a preset rotation angle range, driving the sweeping robot to retreat and rotate so as to be separated from a collided obstacle; and executing the fixing step repeatedly until the collision occurs outside the preset rotation angle range, and achieving the escape. One wheel of the robot is fixed to serve as the fixed wheel, the driving wheel opposite to the fixed wheel is driven to rotate, the sweeping robot is driven to rotate around the fixed wheel, the sweeping robot tries to come out of a trapped area in a rotating mode, and efficient separation from the narrow trapped area can be achieved through the scheme.