Micro-blog marketing refers to a kind of marketing method that creates value for merchants and individuals through micro-blog platform, and it also refers to the business behavior mode that merchants or individuals discover and meet various needs of users through micro-blog platform. This paper first makes a brief introduction of "small botanical garden project", then explains the value of microblog marketing and how to use microblog to carry out online marketing promotion of "small botanical garden project", and finally makes a summary.