The main complications after PCI (percutaneous coronary intervention) contain stent thrombosis，hemorrhage of digestive tract，contrast-induced nephropathy，anxiety and depression after PCI，no-reflow etc.In this paper，syndrome studies of the above main complications in recent 10 years were summarized and analyzed，and the regularity characteristics were summarized.The main pathogenesis of stent thrombosis after PCI is qi deficiency，blood stasis or phlegm turbidity and accumulation of poisons; the main TCM (traditional Chinese medicine) pathogenesis of hemorrhage of digestive tract is qi deficiency and blood stasis or phlegm turbidity; the main TCM pathogenesis of contrast-induced nephropathy is damp and heat accumulation，blood stasis，the deficiency of qi; the main TCM pathogenesis of anxiety and depression after PCI is liver qi stagnation accompanied with qi deficiency and blood stasis; the main TCM pathogenesis of no-reflow is qi stagnation and blood stasis，phlegm-stasis stagnation，yang deficiency and blood stasis，poison and blood stasis，of which the essence is deficiency in origin and excess in superficiality.According to the characteristics of TCM syndromes mentioned above，it provides TCM syndrome support for the effective prevention of complications after PCI.