This utility model relates to the field of filter felt pad technology, specifically a gradient pore self-cleaning filter felt pad, comprising a multi-layer gradient pore felt substrate, wherein the multi-layer gradient pore felt substrate consists of an outer layer, a middle layer, and an inner layer in sequence from the outside to the inside. The pore size range of the outer layer is 50-200μm, the pore size range of the middle layer is 10-50μm, and the pore size range of the inner layer is 0.1-10μm. A support frame is provided between the outer layer and the middle layer, and a quick connector is provided at one end of the support frame. A spiral tube is provided between the support frame and the interior of the middle layer, and the spiral tube is provided with flushing holes. This structure significantly improves self-cleaning ability and reduces manual intervention through the synergistic effect of spiral tube flushing and hydrophobic
coating. Users only need to connect an external flushing
pipe and provide flushing fluid such as water or add cleaning fluid to complete the efficient cleaning operation, saving complicated tools and manual operation.