Single-opening cleaning and separating mop bucket

The utility model discloses a single-opening cleaning and separating mop bucket which comprises a bucket body, a bucket cover is arranged on the bucket body, an extrusion opening for a flat plate mop to penetrate through is formed in the bucket cover, and a water spraying opening for spraying water towards the flat plate mop is further formed in the bucket body. The barrel body is provided with a water storage cavity a and a water storage cavity b, at least one water inlet through hole is formed between the water storage cavity a and the water storage cavity b, the water spraying device further comprises a water pumping mechanism, the water inlet end of the water pumping mechanism is connected with the water storage cavity b, and a movable communicating piece is arranged between the water outlet end of the water pumping mechanism and the water inlet end of the water spraying opening. The communicating piece has a first state in which the water outlet end of the water pumping mechanism is communicated with the