Abstract:Industrial solid waste pollution has become the main problem of solid waste pollution due to its large amount and low recycling proportion. The key to solve the problem of solid waste pollution is to do a good job in treatment, disposal and recycling of industrial solid waste. Green financial support method can provide support for technological innovation in the whole process of green technological innovation system and is an indispensable and important help in the innovation system. Using propensity score matching (PSM) method and the Differences-in-Differences (DID) model, green finance support method for technological innovation of solid waste recycling in bulk industry is studied theoretically and empirically from three aspects: mechanism of action, effect verification and improvement. It can support and promote the application and improvement of green finance in technological innovation of bulk industrial solid waste recycling.Using the propensity score matching (PSM) method and the differences in differences (did) model, this paper makes a theoretical and Empirical Study on the green financial support method for the technological innovation of bulk industrial solid waste recycling from three aspects: action mechanism, effect verification and improvement, In order to support and promote the application and improvement of green finance in the technological innovation of bulk industrial solid waste recycling.