The invention provides a kit for detecting anti-psychosis drugs in a serum and plasma by a liquid chromatography tandem mass spectrometry method. The kit comprises drug standards: amsulpiride, aripiprazole, dehydroaripiprazole, chlorpromazine, clozapine, n-desmethylclozapine, risperidone, 9-hydroxyrisperidone, quetiapine, olanzapine, ziprasidone; drug internal standard compounds: amplepiride-d5, aripiprazole-d8, chlorpromazine-d3, clozapine-d8, risperidone-d4, 9-hydroxyrisperidone-d4, quetiapine-d8, olanzapine-d8, ziprasidone-d8; drug extraction compounds: methanol solution 60% (volume ratio),acetonitrile solution 20%, isopropanol solution 10%, purified water 10%; negative plasma; and a diluent: 50% aqueous methanol solution. The kit can be used to simultaneously detect anti-psychosis drugs and active metabolites thereof, the detection time is short and the flux is large.