A process for comprehensive utilization of asbestos tailings includes such steps as breaking, dissolving in acid, filtering, oxidizing filtrate, adding alkali, reaction, filtering to remove iron hydroxide, adding alkali and surface treating agent, reaction, filtering, drying, breaking to obtain superfine active magnesium hydroxide, dissolving dregs in alkaline solution, filtering, adding acid, depositing, adding isolating agent, agenig, filtering, washnig, drying, breaking to obtain superfine SiO2, calcining iron hydroxide to obtain iron oxide, mixing with mine tailings and assistant, and making color bricks.