Premature junctional contraction is a condition in which the point of excitation of the heart originates in the junctional zone and an early excitation occurs from the junctional zone, called junctional premature contraction, also called junctional preterm contraction or junctional preterm contraction. Premature junctional contractions can be seen in normal people or in patients with organic heart disease or systemic diseases. Junctional premature contractions can occur in normal individuals under adverse stimuli such as strenuous exercise, emotional stress, exertion, and cold. If there is no obvious discomfort and the attacks are infrequent, they are often ignored by patients. Junctional premature beats can only be detected by physical examination or 24-hour ambulatory electrocardiogram. Avoiding triggers will reduce premature beats episodes, usually pay attention to controlling emotions, keep heart rate stable, do not do special treatment temporarily when heart rate is not fast, pay attention to outpatient follow-up, and just solve abnormalities in time when they are detected. Clinically pathologic premature junctional beats are mostly seen in hypertension, heart disease, coronary artery disease, myocarditis, cardiomyopathy, electrolyte disorders, etc. Treatment of the primary disease and correction of electrolyte disorders can effectively relieve the symptoms of premature beats.