Public diplomacy is an important part of China`s diplomatic necessary strategy.After the founding of new China, China`s public diplomacy had experienced three different stages of development, individually pursuit what is the goal of international recognition, international cooperation, advocating peace and development. Recently years, China`s public diplomacy instantly got through the exploration and practice which was showing a good momentum of development. China`s public diplomacy has changed the traditional purely strategy of the fundamental key for propaganda china,now focus on the more rational and objective illustrating china to the world ,and participating Organizations increasingly. The public diplomacy is rich contents, various forms, and efficiency becomes more obvious. Although has obtained certain achievements by observation the public diplomacy after the found of china, there are some problems and deficiencies. In conception, not enough attention to public diplomacy, insufficient capital and professional talents are not the same time; On the main body, the government role is overweight and political color is strong; On the object,lack of pertinent questions. Therefore, for achieving maximum efficacy in public diplomacy,we should take effective measures to construct the system of public diplomacy with Chinese characteristics. First, to improving the strategic position of public diplomacy and fully integrated public diplomacy resources; Second, to strength their ability for guiding the international public opinion; Third, to strengthening the construction of subject of public diplomacy and conducting multiple actors in public diplomacy; Fourth, to paying attention to the object of studying the public diplomacy and strengthening the pertinence of public diplomacy. This article is divided into three parts. The first part, mainly introduced the development process of public diplomacy in China. The second part, this paper expounds the characteristics and some problems of China`s public diplomacy. The third part is that how to effectively carry out china public diplomacy which put forward some policy suggestions.