The invention provides a device for recycling sewage. The sewage treatment device comprises a water inlet pipe (17), a drainpipe (18), a collection pipe (19), a filter (8) of which the water inlet end is connected with the collection pipe (19) and a water box (14) connected with the water outlet end of the filter (8) through a recycling pipe (23) provided with a water pump (9). In addition, the inside of the water inlet pipe (17) is provided with a turbidity detection unit (4); the turbidity detection unit (4) is provided with a valve component which is connected with the water outlet end of the water inlet pipe (17), the water inlet end of the drainpipe (18) and the water inlet end of the collection pipe (19) and is capable of carrying out switching between the state of the connection ofthe water inlet pipe and the drainpipe and the state of the connection of the water inlet pipe and the collection pipe and a control unit electrically connected with the turbidity detection unit (4),the valve component and the water pump (9). The device for recycling the sewage can allow higher-turbidity sewage to be directly discharged without passing through the filter to protect the filter from being damaged.