Abstract: Highly concentrated metal slurry is a sort of suspending liquid belonging in non-Newtonian fluid, which concerns not only the movement of solid-liquid double-phased fluid, but also quite a few physical and chemical properties of the slurry itself (Such as γ, pH, d_ep, σ, ρ_s, ρ_o, C_m, δ, the solidifying effect of the double-layer potential, electrosticky effect of the electrolyte and kinetic effect of microparticles), and its parameters of rheological characteristics are data important for pipelining ore slurry over long distance. Rheological experiments and researches into these highly concentrated slurry have been carried out in order to obtain these parameters. The article deals in detail with the selection of samples and the instruments concerned; presents the test results as to rheological characteristic of 10 kinds of metal slurry; work out through analysis the rheological models of such kinds of slurry, covering the factors that affect the 4 kinds of frequently used models; and gives out the formulas for calculating the relative viscosity and the coefficient of rigidity, if the physical parameter of slurry is set. It is verified by practice that these formulas used fog calculating the parameter of rheological characteristics are of same accuracy, adequate for calculating that of ferric or non-ferric metals.