Trade and investment liberalization interact with and promote each other in the process of regional economic integration. So there must be a close relationship between the China-Japan-Korea Trilateral Investment Agreement and the ongoing China-Japan-Korea Free Trade Area negotiations. Since their degrees of liberalization and regional advantages vary，the investment in various industries will take different forms in the free trade area among China，Japan and ROK. However，at the same time，there are still some obstacles and problems in investment activities in the free trade area. To this end，China needs to enhance political mutual trust with Japan and ROK and accelerate the negotiations of FTA. Besides，the Chinese government should also take effective measures to actively guide the investment activities of Japanese and Korean companies in China and to encourage more Chinese enterprises to make investments in Japan and ROK.