The diagnostic criteria for toxic myocarditis are evidence of toxins or poisons entering the body via the skin mucosa, gastrointestinal tract, and respiratory tract, followed by clinical manifestations such as cardiac insufficiency arrhythmias, and laboratory tests, which can easily diagnose toxic myocarditis. The clinical manifestations of toxic myocarditis include palpitations, shortness of breath, and bruising of the body and pulmonary circulation. This manifestation of cardiac insufficiency, which is a manifestation of arrhythmia. Aspects of treatment should immediately terminate the continued entry of poisons and toxins into the body and promote excretion. The use of antidotes or antagonists to improve metabolism and nutrition to prevent and control cardiac insufficiency and arrhythmias. In addition, it is the need for symptomatic treatment.