The invention discloses a crawler type spherical robot, which comprises a spherical shell, a frame arranged in the spherical shell, a rolling drive device arranged on the frame, a mechanical arm arranged on the frame, spherical shell opening-closing devices and a crawler travelling device, wherein the spherical shell consists of a left semi-spherical shell and a right semi-spherical shell; the spherical shell opening-closing devices are both arranged between the frame and the left semi-spherical shell and the right semi-spherical shell; the robot also comprises a driving motor arranged on theframe, and the driving motor is connected with the left semi-spherical shell and the right semi-spherical shell by a transmission mechanism, so that the left semi-spherical shell and the right semi-spherical shell can move relative to the frame so as to realize the opening and closing of the spherical shell; and the frame is provided with the driving motor which is connected with the crawler travelling device by the transmission mechanism, so that the crawler travelling device can move to be extended or retracted from the opened spherical shell. The crawler type spherical robot combines the characteristics of the crawler type robot and the spherical robot, better acquires external environmental information, realizes intelligence on the basis of the external environmental information, and further widens the application range of the spherical mobile robot.