Objective:To study on characteristics of TCM syndrome type distribution in the patient of acute coronary syndrome.Methods: 106 cases of acute coronary syndrome were selected and summed up according to TCM syndrome differentiation criteria of obstruction of Qi in the chest.Results:TCM syndrome type distribution in the patient of acute coronary syndrome is in the following order:Yang-deficiency

cold accumulation and blood stasis syndrome>Qi-deficiency and phlegm stagnation syndrome> Qi stagnation and blood stasis syndrome=Yin-deficiency and phlegm stagnation syndrome>Yang-deficiency and stagnation of phlegm=phlegm stasis with stagnation>simple blood stasis>simple phlegm turbid syndrome=simple Yin-deficiency syndrome simple Yang-deficiency syndrome>simple Qi-stagnation syndrome>simple Qi-deficiency syndrome.The symptoms with incidence of over 50% in the Yang-deficiency and accompanied syndromes group were in the following order:precordial pain

oppressed feeling in chest

palpitation

short breath

aversion to cold

cold limbs

weakness

lassitude in loin and knee

polyuria at night.Conclusion:Acute coronary syndrome has complicated pathogenesis

deficiency with excess

and Yang-deficiency

cold accumulation and blood stasis are the main pathogenesis of the disease.