The invention relates to filtering equipment for purifying aquacultural water. The filtering equipment for purifying the aquacultural water comprises a pedestal, a
frustum-shaped screen, a driving shaft, a driving device, a water inlet pipeline, a water outlet pipeline, a backflush device and a control device, wherein the pedestal has a disk shape; a
water storage space is formed in the middle of the bottom part of the pedestal; a
pipe orifice communicated with the water outlet pipeline is arranged on one side wall of the bottom part of the pedestal; a
sewage draining groove is formed in the pedestal; a plurality of
sewage draining holes are formed at the bottom of the
sewage draining groove; the
frustum-shaped screen is formed by arranging a stainless steel surface on a
fixed frame; a fixed part which has a small
diameter and is fixedly connected to the driving shaft is arranged at the top of the
fixed frame; a fixed hoop with a big
diameter is arranged at the bottom of the
fixed frame; the bottom edge of the fixed hoop extends to above the sewage draining groove; a plurality of reinforcing ribs are connected between the fixed part and the fixed hoop; the water inlet pipeline guides water to the top of the screen, so that under the action of gravity, the water flows downwards from the top of the screen, is filtered by the screen and then flows to the
water storage space; and according to a user programmable program, the control device automatically controls the backflush device to synchronize with the rotation of the screen to flush the screen, so low-energy-consumption and high-efficiency automatic washing is realized.