The invention provides a medical bed for providing help for body turning. The medical bed comprises a bedstead, guardrails, a bed surface, an electric control switch device, a bed mat and a bottom rack which are matched with one another, and further comprises a movable support and a support assembly body, and the bottom rack comprises a wheel seat assembling body, a bottom cover and a lifting stand column; the bed surface is composed of multiple rectangular frames, the dimension of the rectangular frames is set according to the body structure, and every two adjacent rectangular frames are connected through a movable shaft; the support assembly body is installed on the bottom rack and provided with the movable support, the bed surface is installed on the movable support and the support assembly body, and the bedstead and the guardrails are installed on the support assembly body; the bed mat is a closed circulating rotating body. Multiple medical nursing functions are realized, the bed surface ascends and descends integrally, the head of the bed surface inclines, legs of the bed surface are inclined, the back of the bed surface is lifted, the legs of the bed surface are lifted, bentand stretched, help is provided for bed surface left body turning, help is provided for bed surface right body turning, and therefore the nursing burden of doctors and nurses is greatly relieved.