The aging situation in traditional Chinese villages is increasingly severe, and the elderly living at home has become one of the main crowd in the villages. Therefore, creating an age-friendly residential environment needs to be solved urgently. As the main activity venue for the elderly, public space carries social functions such as life, production, leisure, and emotional communication and is also the critical breakthrough of age-suitable design in villages. Firstly, in selecting Donghaituo Village as the research object, this paper clarifies the pension status of the elderly and their activity characteristics and space needs through the PSPL survey method. Based on the principle of “guarantee” “participation” and “health” from the perspective of active aging, it then builds an age-suitable evaluation framework and further clears current problems of public space. Finally, five age-suitable strategies are proposed, which are the improvement of the space system, the replacement and combination of functions, the embedded layout of suitable facilities, the design of a comfortable environment, and the organization of activities to provide a reference for the renewal of public space in traditional villages.