Abstract: This paper conducts tests of uniaxial compression，setting time and collapsed slump with mixed disposal paste and expatiates on the relationship of mixed disposal paste properties with cement-sand ratio and concentration of solution.The test results show compressive strength of mixed disposal paste is mainly related to cement-sand ratio and has little relation with concentration of solution.Setting time，collapsed slump and diffusion degree are main related to concentration of solution and have little relation with cement-sand ratio.Compressive strength of mixed disposal paste in the 28 d should be between 1.0 and 2.0 MPa，cement-sand ratio should be less than 1∶12 and concentration should be between 81% and 83%.

Key words: Unclassified tailings, Mixed disposal paste, Cement-sand ratio, Concentration of solution