At present, China's domestic invention patent applications and grants ranked first in the world. China has become a real patent producer. But the level and strength of China's patent applications to the overseas is still relatively weak. From the two indicators of PCT application and triadic patent families which reflect the strength of national (regional) international patent application, China has entered the international forefront in absolute quantity and scale, but there is still a big gap in structure and intensity between the main patent powerful nations with China. Chinese government has set PCT applications into the planning documents. In addition to promoting and motivating domestic enterprises to actively file patent applications overseas, government should also pay attention to monitoring the status of PCT national phase entries and provide the necessary assistance for overseas patent layout.