A hand-held pressure cleaning machine, comprising: a housing, having a handle for grasping; functional components, comprising a motor and a pump driven by the motor which are disposed in the housing; and a liquid inlet, disposed on the housing and capable of being connected to an external water source by using a water pipe, wherein the hand-held pressure cleaning machine further comprises an adapter configured to be connected between the liquid inlet and a portable container, and the hand-held pressure cleaning machine is connectable to the external water source by using the water pipe and connectable to the portable container by using the adapter; the adapter comprises an adapter body and a liquid conveying tube, the adapter body comprises a first connection portion, the first connection portion comprises a first connection end and a second connection end in communication with each other, the first connection end is connected to the liquid inlet, the second connection end is connectable to an opening of the portable container, one end of the liquid conveying tube is connected to or integrally molded on the adapter body, and the other end of the liquid conveying tube is suitable to extend into the portable container; the adapter body further comprises a second connection portion, the second connection portion is disposed in the first connection portion, and is in communication between the first connection end and the second connection end, and the liquid conveying tube is fixedly or detachably connected to or integrally molded on the second connection portion, and is suitable to extend into the portable container. a housing, having a handle for grasping; functional components, comprising a motor and a pump driven by the motor which are disposed in the housing; and a liquid inlet, disposed on the housing and capable of being connected to an external water source by using a water pipe, wherein the hand-held pressure cleaning machine further comprises an adapter configured to be connected between the liquid inlet and a portable container, and the hand-held pressure cleaning machine is connectable to the external water source by using the water pipe and connectable to the portable container by using the adapter; the adapter comprises an adapter body and a liquid conveying tube, the adapter body comprises a first connection portion, the first connection portion comprises a first connection end and a second connection end in communication with each other, the first connection end is connected to the liquid inlet, the second connection end is connectable to an opening of the portable container, one end of the liquid conveying tube is connected to or integrally molded on the adapter body, and the other end of the liquid conveying tube is suitable to extend into the portable container; the adapter body further comprises a second connection portion, the second connection portion is disposed in the first connection portion, and is in communication between the first connection end and the second connection end, and the liquid conveying tube is fixedly or detachably connected to or integrally molded on the second connection portion, and is suitable to extend into the portable container.