The invention provides a mobile terminal e-commerce platform system based on a block chain, and belongs to the technical field of e-commerce platforms. The mobile terminal e-commerce platform system based on the block chain specifically comprises an e-commerce platform user, a block chain e-commerce platform, a platform back-end system, a platform front-end system, a block chain end system and a check-in merchant. According to the mobile terminal e-commerce platform system based on the block chain, the block chain is combined with a traditional e-commerce platform, and information transmissionis established by utilizing a block chain technology, so that transaction records are recorded in the chain, non-tampering and distributed account books are ensured, the data encryption level is increased, and the security is enhanced. Simple distributed transaction processing can be realized, mining rewards are reasonably distributed, an e-commerce information block chain can be issued at a mobile terminal, and the use and propagation intention of a user is improved. Through centralization of the e-commerce platform based on the block chain, processing and storage of core data are ensured, and the safety performance and anti-risk capability of the system are improved.