A jet cleaning structure of a cleaning robot mainly comprising at least one jet port and one roller brush, wherein the jet port is disposed at a perimeter of a suction port at the bottom of the cleaning robot and is provided for ejecting air towards the underside of the suction port; the roller brush includes a shaft and a plurality of hard brush rods, wherein two ends of the shaft are disposed in a roller groove at the bottom of the cleaning robot, the plurality of hard brush rods is arranged in a straight or helical manner in equal parts on the shaft, when the cleaning robot is moving, the cleaning robot drives the shaft to rotate with respect to the moving direction of the cleaning robot so that the cleaning robot can use the plurality of hard brush rods to push away the fluff of the carpet and use the jet port to eject air to blow away the dust and foreign substance accumulated at the bottom of the fluff, thereby allowing the suction port disposed at the bottom of the cleaning robot to suck in the dust and foreign substance accumulated at the bottom of the fluff to the dust box and to effectively clean the carpet.