NGOs are faced with the dilemma of action logic in participating in poverty alleviation at the grass-roots level：if they do not embed into local areas，they cannot carry out activities；if they embedded too deeply，it will be molded in reverse and cannot realize successful exits. So what action logic will the NGOs take in the process of poverty alleviation？Through the field observation of H organization which participating in the poverty alleviation project of the pig farm in Village J，this paper puts forward the action logic of “soft embeddness” on the basis of the theory of “embeddedness” and “soft governance”. Soft embeddness mainly includes three aspects：the soft relationship embeddness of culture and custom，the soft resources embeddness of negotiation by many parties and the soft structure embeddness of the rural regulations and folk conventions. Compared with the “hard embeddness” which emphasizes the institutionalism and Inculcation，the “soft embeddness” action logic has its own characteristics. It includes the flexibility of interaction，the strategy of participation and the limited responsibility boundary. the “soft embeddness” action logic brings to maintaining the autonomy of NGOs，promoting the accumulation of village social capital and realizing the sustainable development of poverty alleviation projects. At the same time，this paper theoretically complements and extends the interaction between the states and the society as well as the action logic of NGOs in China.