Knee-chest recumbent position has the following steps: 1, first of all, to empty the urine, after loosening the belt, both knees kneeling on the bed, the two calves flat on the bed a little apart. 2, take the head and chest low, the body leaning forward, the buttocks lifted up position, the chest should be as close as possible to the bed. 3, the thighs are perpendicular to the bed, the abdomen is suspended, hips lifted. 4, the head is turned to the side, the two arms are bent to put on the bed on the two sides of the head. Knee-thorax position is a commonly used position in obstetrics and surgery. The purpose of the obstetric knee-thorax position is for correction of fetal position. At 30-34 weeks of gestation, if the fetus is not in the correct position, it is necessary for the pregnant woman to perform corrective exercises in the knee-chest position. In surgery, the knee-chest position is commonly used for anal and rectal examinations.