The invention discloses a portable reverse osmosis water treatment machine which can be carried about, and relates to the portable reverse osmosis water treatment machine. The machine comprises a filter element, a high-pressure hydraulic pump, a reverse osmosis film and a bleeder cock. The machine is characterized by comprising a case body and a case cover which is hinged with the case body, wherein a handle is arranged outside the case body; an underplate is fixed in the case body; the filter element, the high-pressure hydraulic pump, the reverse osmosis film and the bleeder cock are arranged on the upper surface of the underplate; an outlet pipe of the bleeder cock can be rotated, and is provided with a rotating face vertical to a base of the bleeder cock; and the case cover is provided with a work bag. The water treatment machine has the advantage of convenient portability, can be used as a camping vehicular water treatment machine to solve the problem of drinking water safely locally, and also can be used as propaganda and representation equipment.