The present invention relates to application of N- [4- (1- cyan cyclopentyls) phenyl] -2- (4- picolyls) amino-Niacinamide salt, especially its hydrochloride and the mesylates and the salt in preparation treatment anti-tumor drug.本發明涉及N-[4-(1-氰基環戊基)苯基]-2-(4-吡啶甲基)氨基-3-吡啶甲酰胺的鹽,尤其是其鹽酸鹽和甲磺酸鹽,及所述鹽在製備治療抗腫瘤藥物中的應用。