Objective:To explore the application of Omaha system-based specialized precise nursing intervention in patients with acute coronary syndrome (ACS).Methods:This study recruited 120 hospitalized patients with ACS in the Department of Cardiology, the First Affiliated Hospital of Xi′an Jiaotong University from June 2019 to December 2019. These patients were randomly allocated into the experimental ( n=60) or control group ( n=60) by using a random number table. Patients in the control group received routine care only, while those in the experimental group also received the Omaha system-based specialized precise nursing intervention. Results:After the intervention, compared with the control group, the score of cognitive and behavioral status in the experimental was significantly improved. In particular, the cognitive scores of pain, chest tightness, arrhythmia, hypertension, edema, dizziness, constipation, wound bleeding, swelling, fatigue, insomnia, diet, medication, smoking, drinking, overweight, exercise, mental stress, social regression, and awareness were significantly improved ( t values were 1.39-5.06, P<0.05). The behavioral scores of pain, chest tightness, arrhythmia, hypertension, edema, dizziness, constipation, wound bleeding, swelling, fatigue, diet, medication, overweight, exercise, mental stress, and social regression were significantly improved ( t values were 1.41-4.80, P<0.05). The fatigue, insomnia, exercise compliance, mental stress, and social regression were significantly improved ( t values were 1.44-4.27, P<0.05). Conclusions:Omaha system-based specialized precise nursing intervention can comprehensively evaluate the nursing problems of patients with ACS, can implement precision specialized nursing, can effectively solve the nursing problems of patients, and can promote the recovery of heart function and rehabilitation of patients with ACS.