Population aging in Guangdong-Hong Kong-Macao Greater Bay Area （the Greater Bay Area） has increased significantly. With the deepening cooperation among Guangdong，Hong Kong and Macao in various fields，receiving cross-border elderly care services may become an optional choice for the elderly in Hong Kong and Macao in the future. Meanwhile，the mature elderly care service system in Hong Kong and Macao can provide valuable experience for the mainland. Based on the analysis of the current situation of population aging in the Greater Bay Area，this paper analyzed the necessity of cross-border pension，summarized the exploration of the new cross-border pension model in the Greater Bay Area，and provide some suggestions for the improvement of cross-regional pension services in the Greater Bay Area. This study finds that the key and difficult points of cross-border pension lies in the deepening promotion of welfare portability and the weakening trend of the comparative advantage of living costs in the three places. Based on the findings，this paper put forward the following suggestions. For welfare portability，establish a sharing mechanism of medical and health resources for the elderly in the three places to break through the barriers of cross-border pension. For standards，promote the unified standards of the elderly care service industry in the three places to reduce the gaps among regional elderly care resources. For human resources，promote the mutual recognition of qualifications of nurses for elders in the three places. For，build a cooperative model of elderly care services with “government+market+society” as the main body，and expand diversified financial channels. For government policies，establish a leadership communication mechanism for cross-border cooperation and build effective high-level communication channels.