NOVELTY - Preparing high quality red lead by utilizing lead slime of waste lead-acid storage battery involves (a) taking out lead slime from waste lead-acid storage battery, mixing without separating into cathode and anode, drying repeatedly to neutral, mulling into lead slime powder; (b) mixing lead slime powder with aqueous solution comprising dispersant and desulfurizer, and stirring and desulfurizing; and (c) separating and removing the liquid part, washing obtained solid material; tiling material in ordinary box type or muffle furnace or tube furnace, roasting.    USE - Process for preparing high quality red lead.    ADVANTAGE - The process has low preparing cost, high lead coefficient of recovery and high quality, and has obvious effect of decreasing energy consumption and environment pollution.    DETAILED DESCRIPTION - Preparing high quality red lead by utilizing lead slime of waste lead-acid storage battery involves (a) taking out lead slime from waste lead-acid storage battery, mixing without separating into cathode and anode, drying after washing repeatedly to neutral, mulling into lead slime powder with granularity more than 200 meshes; (b) mixing lead slime powder with aqueous solution comprising dispersant and desulfurizer with ratio of 1:1-10, and under the condition of satisfying quality ratio of lead slime powder: desulfurizer: dispersant=1:0.15-0:0.01-0.1, mixing lead slime powder with aqueous solution comprising dispersant and desulfurizer, and then fully stirring and desulfurizing at 25-90 degrees C for 1-24 hours; and (c) separating and removing the liquid part, washing obtained solid material comprising lead to neutral; tiling material (1-20 centimeter) in ordinary box type or muffle furnace or tube furnace, roasting for 1-12 hour at 400-500 degrees C; and desulfurizer is soluble carbonate, comprising alkali metal carbonate or ammonium carbonate, carbonic acid, hydroxide; dispersant is cathode or anode, non-ionic surface active agent, solubility organic acid salt.    DESCRIPTION OF DRAWING(S) - The drawing shows an X-ray powder diffractogram of high quality red lead.