The primary objective of the study is to confirm the efficacy of compound Edaravone Injection via intravenous infusion every 12 hours in the patients with Acute Ischemic Stroke(AIS) in a double-blind, active-controlled manner. The study is also to examine the safety of compound Edaravone Injection for the AIS patients.

Inclusion Criteria:

• Hospitalized patients, diagnosed of ischemic stroke;
• Onset of stroke is less than or equal to 48 hours;
• There are clear signs of neurological deficit: 4≤NIHSS score≤24, and also, the sum of NIHSS score for the upper limb and the lower limb is greater than or equal to 2;
• Patients signed written inform consent

Exclusion Criteria:

• Cranial CT scan finds intracranial bleeding disorders: hemorrhagic stroke, epidural hematoma, intracranial hematoma, intraventricular hemorrhage, subarachnoid hemorrhage;
• Iatrogenic stroke;
• Severe disturbance of consciousness: NIHSS category 1a for consciousness is greater than 1；
• The mRS score prior to this onset is greater than 1;
• Transient ischemic attack (TIA);
• SBP after blood pressure control is still greater than or equal to 220 mmHg, or DBP after blood pressure control is still greater than or equal to 120 mmHg;
• Patients with severe mental disorders and dementia;
• ALT or AST is greater than 2.0×ULN or previously known liver diseases, such as acute hepatitis, chronic active hepatitis, liver cirrhosis;
• Serum Creatinine (SCr) is greater than 1.5×ULN, Creatinine Clearance (CrCl) is less than 50 ml/min or previously known severe renal diseases;
• Therapeutic neuroprotective agents have been applied after onset of stroke, including commercially available edaravone, nimodipine, ganglioside, citicoline, piracetam, butyl benzene peptides, Urinary Kallidinogenase;
• Arterial or venous thrombolytic therapy has been applied after onset of stroke;
• Patients with malignant tumors or receiving concurrent antitumor treatment;
• Patients with severe systemic disease, life expectancy is less than 90 days;
• allergic to edaravone , (+)-Borneol or related excipients;
• Pregnant or lactating women;
• Have major surgery within 4 weeks before enrollment;
• Participated in other clinical studies within 30 days before randomization; or participating in other clinical trials at present;
• The investigators consider the patients are not suitable for this trial.