This application a pitch sludge concentration device, includes the sludge impoundment, the sludge impoundment is equipped with a plurality of slopes and pushes away the mud board, the top of sludge impoundment is equipped with the guide rail, the slope pushes away the mud board and follows the guide rail removes, guide rail rigid coupling vertical telescopic rod, the sludge impoundment still is equipped with the supernatant draw -out device, sets up the slope in the sludge impoundment and pushes away the mud board, and sewage flows in the sludge impoundment, and mud natural sedimentation subsides and accomplishes the back on the slope fender, and the sludge impoundment is released with mud to the slope fender, makes things convenient for operating personnel clearance mud, convenience very, and intensity of labour is little.