Abstract: In order to better solve the problem of treating and recycling of wastewater from lead-zinc concentrator in Meixian Beneficiation Plant of Fujian Jindong Mining Co.，Ltd.，and based on analyzing the disadvantages of the former PAM wastewater treatment process，laboratory tests and industrial test on the new JCSS process were made. The effect of the recycled wastewater on the lead-zinc flotation was investigated. The results showed that the recycled wastewater treated with JCSS process could make the content of COD_Cr and Cu²⁺，Pb²⁺，Zn²⁺ greatly lower than the requirement of the reuse water. The recycled wastewater with JCSS process did not affect the index in beneficiation production. Furthermore，the running costs of JCSS process are lower than that of the former PAM about 1.484 yuan/t. According to the test results above，Meixian Beneficiation Plant decides to adopt JCSS process instead of the former PAM process.

Key words: Beneficiation wastewater of lead-zinc ore, New JCSS wastewater treatment process, PAM wastewater treatment process, Reuse of wastewater