| Online Group Shopping as a new type of online trading model makes a great difference in the world,this transaction model presents a unique difference from the traditional commodity transactions due to the third-party group purchase platform,a series of defaults in real life arising from the breach of contract are not uncommon. On the one hand, the innovative group purchase model has caused the legal relationship between the parties to be complicated and changeable. On the other hand, the participation of the group purchase platform makes it difficult to determine the ownership of the liability for breach of contract. Recognizing the problem of default in the Online Group Shopping group, making the legal status of third-party group purchase platform is the key to improve its liability system. Network contract in the contract content is generally developed by the platform unilaterally, consumers in the case of losing initiative can only choose passive acceptance, it is very different from the formation of traditional contracts. Different from the ordinary online shopping, the online group shopping makes the number of participants as a centralized bargaining capital, there must be a certain number of consumers to formally enter, and at the same time the buyer must pay the bills up front, in order to obtain payment vouchers before the line consumption. Due to the 020 business model, there is a significant difference between the group purchase and the non-group purchase,which is different from the traditional sense of price discrimination. The contract depends on the network virtual data seriously, the information asymmetry caused by it becomes an important reason of breach of contract. This paper expounds the responsibility of breach from the two aspects of default and disclaimer, including the practical problems caused by network default and the special exemption of network technology risk and consumer cooling period. As the group purchase platform has the opportunity and advantages of the transaction, the contract should be selected in the exemption clause which is not conducive to the interpretation of the platform side. In order to promote the development of online group shopping breach system, the article puts forward the legal status of the platform as the "agent", and finds it as an indirect agent of the business and clarifies. Through the consumer, group purchase platform and business tripartite perspective to explore the specific application of the liability of contract to ensure the responsibility of contract can be held effectively. |