Abstract: SnW polymetallic deposit in the north section of Beilongdui in Chenzhou City,Hunan Province is loacated in Dongpo Ore Field in WSnMoBi polymetallic metallogenic belt in Southern Hunan Province,the metallogenic geological conditions prospecting prospective of the mining area are both good.Based on the geological characteristics of the deposit and the existing prospecting results,the geological characteristics of the main orebodies such as No.101、No.102、No.103 orebodies are discussed.Based on the above discussion results,the optimization method of the layout of prospecting engineerings during the exploration process of fissure filling veined belt type SnW polymetallic deposit are analyzed.The optimized method can be summarized as:①the prospecting engineering should not be controlled by each ore belt alone,the ore hosting layer should be controlled by prospecting engineering overally;②continuous sampling of lithologic sections containg toxic sand,tin and tungsten veins should be conducted,it can not only avoid ore leakage,but also provide direct basis for redelineating orebodies after adjusting industrial indexes in the future.

Key words: SnW polymetallic deposit, Fissure filling, Prospecting method, Optimization