The present invention discloses a water
cutting machine tool and a filtering method. The water
cutting machine tool comprises a mechanical arm, a
cutting platform, a filtering device, a
water storage tank, a high-pressure pump and a
backwashing pool; the filtering device is provided with two
branch systems; when the filtering device is applied to online filtering, filtering portions can be replaced; the
water storage tank is filtered level by level through a collection tank, a mitigation tank and a clear water tank; the high-pressure pump is used for generating high-pressure water which can be used by a
nozzle on the mechanical arm; the mechanical arm is connected with a
control unit; the
nozzle on the mechanical arm operates on the cutting platform; the filtering device is arranged between the water outlet of the cutting platform and the
water storage tank; the high-pressure pump is arranged between the
water storage tank and the mechanical arm; the filtering device is connected with the
backwashing pool; and a submerged pump is arranged between the filtering device and the clear water tank. With the water cutting
machine tool and the filtering method adopted, on-line reverse cleaning of the filtering portions of the single
branch systems can be realized, and the service lives of the filtering portions can be prolonged, and the use costs of the filtering portions can be decreased, and the
cost control of the water cutting machine can be optimized.