Modern urban plaza’s function will be more diversified, three-dimensional space structure, place spirit, trend to sustainable development. To follow the people-oriented, local characteristics, benefits and highlight the theme of the principle of comprehensive functions of the design of urban plaza. A case of HY International Plaza, analysis the commercial function, public space, public transport systems and facilities, barrier free road and lighting system ,medical and educational function and so on. Finally, put forward the optimization countermeasure for the existing problems of its comprehensive functions.