Carotid cavernous fistula (CCF) is an abnormal communication between the carotid system and the cavernous sinus, according to the cause, blood flow speed and location of the disease; it can be divided into direct type and indirect type. In this case, a 73-year-old woman was referred to the emergency department due to dizziness. Computer tomography and magnetic resonance imaging showed that she was suspected of CCF, then perform angiography to diagnose indirect CCF. Trans-Catheter embolization was arranged immediately, and successfully cured after embolization by placing metal coils (EV3, Irvine, Calif). In addition to explaining the clinical treatment of CCF patients with metal coil embolization, this case report also evaluates the clinical diagnostic application of magnetic resonance angiography with non-contrast agent injection in CCF patients.