Blockchain has the technical characteristics of decentralization, non-forgery, traceability and transparency, which provides innovative technical solutions for the development of Internet public welfare crowdfunding.In the field of Internet public welfare crowdfunding, blockchain technology mainly has five application scenarios of information traceability, credit enhancement and authentication, audit and settlement, data sharing and information security.The application framework of Internet public welfare crowdfunding based on block chain mainly includes three layers, namely, the basic technology layer, the intelligent contract layer and the application service layer. The functions such as donation tracing, information disclosure and data sharing have solved many"pain point" in the current Internet public welfare crowdfunding field.