The utility model relates to a settling type immersion biological filter. The settling type immersion biological filter comprises a settling pond, a biological filler layer, a bar-shaped grating, a blocking screen stencil and a sludge pump, wherein the biological filler layer, the bar-shaped grating and the blocking screen stencil are all arranged in the settling pond; the biological filler layer is arranged in the middle of the settling pond to form an immersion filter; the bar-shaped grating is positioned above the biological filler layer; the blocking screen stencil is arranged below the biological filler layer; the sludge pump is arranged in a sludge pumping port in the side part of the settling pond; and the sludge pumping port is communicated with the settling pond. Compared with the prior art, the settling type immersion biological filter can be used for pumping the sludge by utilizing the sludge pump, and under the action of the blocking screen stencil, for the biological filler layer, blocked filler is dispersed and re-entered to the settling pond with the water flow for being suspended, thereby conveniently solving the problem that the biological filter is easily blocked.