A first-aid device for detecting myocardial infarction, including a wearable textile, a first alarm detection unit, a second detection alarm unit, and a charging first-aid unit for actively detecting and alerting to myocardial infarction, instantly supplying crucial medicine, and providing a charging function. In particular, the wearable textile put on a patient carries the first alarm detection unit actively detecting myocardial infarction, the charging first-aid unit instantly provides the user medicine to alleviate painful symptom, and at the same time, the second detection alarm unit serves as a spare part while the first alarm detection unit is charged by the charging first-aid unit. As a result, the first alarm detection unit and the second detection alarm unit are alternatively used for actively and ceaselessly detecting myocardial infarction assuring first-aid for the patient.
