DCU cage type regulating valve is of single-base sleeve type with its core designed with pressure balancing hole. Its valve body is of compact conformation. The flow channel is S type streamlined and mounted with a guide vane improving the fluid equilibrium flow in the periphery of the sleeve. It has advantages of small loss caused by pressure drop, mass flow, wide adjustable range, cavitation corrosion resistance and high-precision rating curve. The regulating valve has excellent shutting off and sealing performance. The leakage ratio of the valve base is equivalent to that of single-base valve.