Abstract: The disclosure provides a filtering device comprising a housing, a blocking member and a screening member. The housing includes a body, an inlet end and an outlet end. The housing forms an accommodation space. The inlet end and the outlet end are respectively formed at two ends of the accommodating space. The inlet end is capable of receiving fluid. The blocking member is capable of splitting the fluid into a plurality of fluids and collecting the non-fluid composition of the secondary fluid having a first size. The screening member is disposed between the inlet end and the blocking member, and the screening member is configured to receive the secondary fluid to limit the non-fluid composition having a second size of the secondary fluid to the screening member. After the secondary fluid passes through the shield and the screening member, the secondary fluid is output from the outlet end.