Abstract: Unclassified tailings filling mining is one of the important ways to create green mines and realize clean production.Reducing the cost of filling mining and improving the economic，environmental and safety benefits of filling mining are the permanent goals pursued of the study and development of filling mining technology.Firstly，the study and development of low cost cementitious materials for unclassified tailings filling，including mixed cementitious materials using solid waste as cement admixture，high water cementitious materials and new low cost cementitious materials developed by using solid waste in metallurgical industry in recent decades are summarized.Then，the study and key technologies of total solid waste cementitious materials are summarized.On the basis of analyzing the demand of total solid waste cementing material，the study route and main study contents of all solid waste cementing material were put forward.Based on the above discussion results，the study and development directions of new type of filling cementitious material for all solid waste with low cost are emphasized.The results show that:①based on the analysis of the study status of total solid waste cementitious materials，the study and development of total solid waste cementitious materials should be developed from steel slag base to multi-solid waste low-cost green filling cementitious materials，the study on the hydration mechanism of total solid waste cementitious materials and the decision method of the ratio optimization of cementitious materials should be emphasized；②It should be closely combined with the mining method and filling technology of the mines by using unclassified tailings filling method，following the new product development route of technology，product and commercial total solid waste cementitious materials，the breakthrough point should be focused on creating a demonstration mine of total solid waste filling material and low cost filling mining technology and process，new progress would be made in technology study and development and industrial application of new filling cementitious materials with low cost and total solid waste.

Key words: Fill mining, Unclassified tailings, Low cost cementing material, Development direction