Objective: To prepare solid dispersions of total quinones from Rubiae Radix et Rhizoma and evaluate its in vitro dissolution ability. Method: This solid dispersions was prepared by solvent-melting method and solvent method. Effect of different matrix on preparation technology were investigated,with solubility and in vitro dissolution performance as indexes, optimal formulation was confirmed. Result: This solid dispersions was prepared by solvent method,its optimal formulation was ratio of polyvinyl pyrrolid...