The invention relates to a settling type waste water solid-liquid separator used for treating materials containing mud and other impurities, and overcomes the problems that present waste water treatment devices are complex in structure and high in energy consumption, materials are deposited to form material deposition, and liquids in dense zones are discharged simultaneously during material discharging. The solid-liquid separator includes a support, a sealed accommodating space supported by the support, and a power gear. The solid-liquid separator is characterized in that the sealed accommodating space includes an upper clear liquid bin, a middle dense zone and a lower material discharging bin from top to bottom; a material guiding umbrella is disposed in the clear liquid bin; the upper segment of the material guiding umbrella is a straight cylinder; a material inlet of a material feeding pipe is in the straight cylinder; the lower segment of the material guiding umbrella is a cone-shaped body the upper part of which is small and the lower part of which is big; the lower end edge of the cone-shaped body is matched with the inner wall of the clear liquid bin to form a clear liquid passage; and the upper and lower ends of the material discharging bin are provided with discharging valves respectively. Inner solid-liquid separation is smooth. Mud cake products formed during discharging and dreg discharging are single. Automatic intelligent operation can be achieved.