The development of information technology makes it posibble that acquiring information timely and accurately, it is very important to share information in the supply chain management. information sharing is the exchange and transmission of information among different enterprises of the supply chain in the process of particular transaction or cooperation. each enterprise can provide effective supply and make resource allocation decision by sharing all kinds of management information in the supply chain. in this paper, it firstly puts forward that information sharing is the foundation of supply chain management. then it analyzes the obstructive factors of information sharing in supply chain. finally, we emphatically discuss the measures of information sharing from the two aspects of technology and security in the supply chain.