The Problems caused by tailings disposal in metal mines are becoming more serious day by day. The total amount of tailings deposited by the Chinese metal mines is more than 4.0 billion tones, and the number is still increasing by 0.21 billion tones per year. The main features of metal mine tailings are extremely fine of particles, huge guantities, strongly poisonous and low bulky density for transportation. Tailings dam occupies large area of land. Accidents may be caused by tailings dam failure. Environmental pollution and underground water pollution are caused by tailings. It is necessary to carry out studies utilizing or treating tailings with new technologies. The comprehensive utilization of tailings should include recovering metal and non-metal elements from tailings, utilizing tailings to make building materials or magnetized fertilizer, etc. The treatment of tailings should include depositing tailings underground, utilizing tailings dam as a waste dump, and land reclaiming while depositing tailings paste. The final purpose of utilizing and treating tailings is to set up a “mine without tailings”.