The experiment established a determination method for total cyanide in  solid wastes containing thiocyanate and sulfide,where silver nitrate titration and isonicotinic acid-pyrazolone spectrophotometry are used to determine the samples with high and low contents of cyanide respectively.Condition test was carried out to optimize the pre-treatment means,sample weight and interference elimination method.The method has a RSD of 0.43 %-1.33 %,recovery rate of 91.5 %-101.5 %,good precision and accuracy,and meets the determination requirements.