Mop bucket for cleaning and squeezing flat mop

A squeezing device for a mop bucket, comprising a first squeezer, a squeezing frame and a water passage, wherein

• the first squeezer is configured to squeeze a wiper on a mop head;
• the water passage is located on the squeezing frame or in the squeezing frame;
• the water passage extends from a first side of the squeezing frame to a second side of the squeezing frame, and the first side of the squeezing frame is opposite to the second side of the squeezing frame;
• the squeezing device is so configured that water squeezed out by the first squeezer flows from a first edge of the squeezing frame to a second edge of the squeezing frame through the water passage, and thus flows out of the squeezing frame;
• and
• baffles are provided on both sides of the water passage, and the baffles are configured to prevent the water squeezed out by the first squeezer from flowing out of the water passage.