At present，China’s international trade environment is not optimistic. It is urgent to enhance its own trade innovation momentum and build a new competitive advantage in global trade. Offshore trade is a pain point in China’s trade and economic development. China has the relevant foundation and conditions for the development of offshore trade. From a macro perspective，social productivity is the basis for the development of offshore trade；from an industry perspective，the development of offshore trade is based on the development of many high-end services related to upstream and downstream；from a micro perspective，the emergence of offshore trade is based on the relative separation of production system and decision-making center of multinational companies. The development conditions of offshore trade mainly include traditional infrastructure such as transportation and emerging infrastructure such as 5G，artificial intelligence，industrial networking and Internet of things. The offshore trade mode of Shanghai Pilot Free Trade Zone is a quasi-offshore trade mode. In order to better carry out offshore trade，the pilot free trade zone has introduced a number of measures，including negative list management mode，financial service innovation，etc.，and actively provided various consulting services for enterprises，so that enterprises can understand the relevant policies and operational procedures of offshore trade. The difficulties and challenges in the development of offshore trade in China’s pilot free trade zone are mainly reflected in the optimization of business environment，especially the improvement of port construction and service management level，the lack of offshore trade service institutions，and the lack of composite trade talents. In addition，it also shows difficulties in foreign exchange management policy constraints，tax system lack of competitiveness，offshore financial business bottlenecks，customs supervision and so on. Finally，the paper puts forward countermeasures and suggestions to promote the development of offshore trade in China’s pilot free trade zone from the policy measures，legal protection，financial services，tax system and customs supervision.