With the change of consumer shopping and the development of e-commerce, most retailers are building the Omni-channel. On the basis of consumption process of Omni-channel, this paper discusses the core of the Omni-Channel - the construction of channel integration: integration of marketing elements, information integration and service integration, and analyzes the case of Yonghui Omni-channel practices. The results show that the retailers' use of mobile stores as an e-commerce breakthrough fits the trend of e-commerce. However, the supermarket retailers featured by fresh products are facing some special problems in online channels. The retailer's full channel practice is currently only in channel 1.0 and also faces the dilemma of channel conflicts, therefore how to further strengthen channel integration is the urgent task of multi-channel retailers' Omni-channel practices.