The invention discloses a transmission travelling mechanism suitable for an intelligent robot. The transmission travelling mechanism comprises a robot main body, a first travelling rack, a first motor, a transverse driving wheel, a transverse travelling belt, a longitudinal travelling device, a transmission device, a driven chain wheel, a first guide wheel, a first support, a chain, a second motor, a second guide wheel, a connecting shaft, a second support, a transverse driven wheel, a second traveling rack, a fixing frame and a driving chain wheel. According to the transmission travelling mechanism suitable for the intelligent robot, the structure is reasonable and simple, and mount is convenient; the transverse travelling belt and a longitudinal travelling belt are arranged to effectively enable the robot main body to transversely and longitudinally walk, and it can be ensured that the robot main body can move on any track in the plane; additionally, the transverse travelling belt and the longitudinal travelling belt are both planar belts so that it is ensured that the robot main body can also stably walk on the uneven ground; and additionally, the first motor and the second motor are both stepping motors, so that accurate control over the travelling speed of the transverse travelling belt and the longitudinal travelling belt is facilitated.