The　solubility　and　the　ionization　effect　of　double-metallic　coordination　compound　ZCTC　in　water　were　studied　by　the　dissolution　balance　method　and　specific　conductance　method.　The　results　show　that　the　solubility　of　ZCTC　which　changes　linearly　with　temperature　in　water　is　4-8　(g/100gH2O)　and　the　solubility　coefficient　is　about　0.102　(g/(100gH2O·°C))　in　the　temperature　range　of　18-60°C;　ZCTC　is　mostly　ionized　to　Cd2+,　Zn2+　and　SCN-,　but　ionization　effect　decreases　obviously　along　with　the　increase　of　concentration,　otherwise,　Zn2+　and　SCN-,　or　Cd2+　and　SCN-　doesn＇t　become　any　form　of　complexes　or　complex　ions　in　the　experimental　concentration　range.　The　experiments　of　stability　and　crystallization　of　ZCTC　in　water　show　that　ZCTC　crystallizes　easily　from　aqueous　solution,　but　it＇s　transparency　is　poor　and　the　shape　is　irregular;　below　45°C,　ZCTC　is　relatively　stable　in　water,　but　its　chemical　stability　decreases　rapidly　along　with　the　temperature　rising　because　of　the　decomposition　producing　corresponding　sulfide　precipitates.