Recently，the detection rate of coronary microvascular dysfunction(CMD) has increased with the popularization of coronary interventional diagnosis and treatment.CMD has become an independent predictor of long-term cardiovascular events.According to the collateral disease theory，CMD is located in collaterals，and its pathogenesis is stasis，stagnation/deficiency stagnation，and contraction of heart collaterals.Dredging collaterals has become the basic rule of law for its treatment.It is believed that aromatic herbs can enter the collaterals and expel harm，and aromatherapy for dredging collaterals perceives better curative effects than the treatment of simply improving the circulation of blood to dredge collaterals.Therefore，CMD treatment by aromatherapy for dredging collaterals is discussed based on the collateral disease theory，as well as the principle and legislation of aromatherapy for dredging collaterals.