The overflow of leaching tank and block of inflation pipe often occurred in the production of silver extracting from silver-containing lead concentrate by cyanidation in some mine,resulting in the stop of the silver extraction's production.For that,the technological transformation of original technology and equipment had been made.Especially the production can be carried through normally by effectually controlling the concentration of leaching solution and changing the place and way of adding sodium cyanide.The statistic results of production index of almost a month indicated that after the technical reformation the average silver grade of the leached concentrate was 11100g/t,the average silver grade of the leached residue was 648 g/t,the leaching ratio of silver was 94.16%.