Some episodes of arrhythmia can be effectively prevented, especially for functional arrhythmias, but if the arrhythmia is organic, it is often treated with a combination of medications or, if necessary, radiofrequency ablation. Today we talk about how to prevent paroxysmal tachycardia. For patients with paroxysmal tachycardia, the first thing to do is to improve their lifestyle, pay attention to regular work and rest, avoid straining and staying up late, low salt and low fat diet, do not eat smoked and fried food, do not eat spicy and stimulating cold food, avoid drinking alcohol, coffee, strong tea and stimulating drinks, exercise appropriately, open windows and ventilation regularly to enhance resistance. If paroxysmal tachycardia still occurs after improving the above aspects, then we can appropriately combine oral medication. Commonly used drugs include heart stabilizing granules, beta-blockers, and non-dihydropyridine calcium antagonists, which can help prevent paroxysmal tachycardia. It is also important to identify the cause of paroxysmal tachycardia and treat the primary disease in order to prevent or cure paroxysmal tachycardia. For a patient who eats poorly on a regular basis and has recurrent hypokalemia, oral potassium-magnesium menthylate combination can be given prophylactically. If a patient has paroxysmal tachycardia due to psychosomatic factors, anxiety, depression, etc., it is recommended to combine anti-anxiety and antidepressant treatment with treatment of the arrhythmia to better prevent paroxysmal tachycardia attacks. The prevention of paroxysmal tachycardia requires the concerted treatment of many aspects. For patients with frequent episodes of paroxysmal tachycardia, it is important to perform ambulatory electrocardiography to assess the overall severity of the arrhythmia. This can be combined with other concomitant symptoms to further improve the examination.