Abstract: A mine uses upward approach and filling mining method but the problems occurs that the filling slurry has large self-flow gradient and that the roof connection rate is poor.In light of those problems,the paper based on pulp flow state and hydraulic theories proposed equivalent streaming technology to make up to the inhomogeneous distribution of filling body strength along the length direction and the self-flow gradient.According to the field industrial test results,the filling body self-flow gradient decreased from 5.0 % to 3.2 % and the roof connection rate increased from 45 % to 56 %,which is good.The study can be used as reference by similar mines.