A cold bed capable of effectively reducing deformation of a bed body belongs to the technical field of small and medium-sized rolling equipment for bars, and is used for avoiding influence of heated deformation of cold beds on yield and product quality. The technical scheme of the cold bed capable of effectively reducing deformation of a bed body includes that the cold bed comprises support legs, a fixed beam, a movable beam and a rack, the support leg, the fixed beam and the movable beam are all in rectangular tube structures with closed end openings, the support legs are communicated with each other by support leg connecting pipes, the fixed beam is communicated with the movable beam by a U-shaped connecting pipe, a water inlet ladle is mounted at the starting end of the cold bed, a water return ladle is mounted at the tail end of the cold bed, and the water inlet ladle is respectively communicated with water inlets of the support legs, the fixed beam and the movable beam by connecting pipes, water inlet control valves are mounted at the connecting pipes, the water return ladle are respectively communicated with water outlets of the support legs, the fixed beam and the movable beam by connecting pipes, and water return control valves are mounted at the connecting pipes. The cold bed is reasonable in technical scheme and simple in structure, is economic and practical, can effectively reduce the temperature of a cold bed area, avoids server deformation after the cold bed is heated, improves yield and quality of steel, and has remarkable economic benefit.