ObjectiveTo summarize the age distribution of different pathological types of primary left ventricular tumor and its influence on preoperative diagnosis, surgical methods and therapeutic effect.Methods The clinical data of 35 patients with primary left ventricular tumor admitted to Fuwai Hospital of Chinese Academy of Medical Sciences from January 2008 to March 2019 were retrospectively analyzed. There were 19 males and 16 females with an average age of 33.81±17.56 years. According to the age, the patients were divided into an infant group (less than 7 years), an adolescent group (7-17 years), a young group (18-44 years), a middle-aged group (45-59 years) and an elderly group (over 60 years). The age distribution characteristics of different pathological types of tumor patients were analyzed, and the influence on surgical methods, short-term and long-term curative effect of surgery in different age groups was analyzed. Within 6 months after the operation, the patients returned to the hospital to review the echocardiography, and then were followed up by telephone.Results Of the 35 patients with primary left ventricular tumor, only 1 patient in the middle-aged group had low malignancy carcinoid tumor, and the others were benign tumors. Fibroma and rhabdomyoma accounted for the majority of the infant group and adolescent group. Myxoma was the common tumor in the young group, middle-aged group and elderly group, followed by lipoma. Thirty-three patients were operated under general anesthesia, hypothermia and cardiopulmonary bypass (CPB). Two patients with epicardial lipoma underwent normothermic surgery without CPB. Nine patients underwent partial resection of left ventricular tumors, and 26 patients received complete resection of left ventricular tumor. There was no hospital death, opening stanching, secondary thoracotomy, low cardiac output, embolism or other complications. The postoperative hospital stay was 7.97±2.56 days, and the postoperative reexamination was normal. Subsequently, 35 patients were followed up by telephone or outpatient service. The average follow-up time was 59.87±37.62 months. In the young group, 2 patients with partial resection recurred.Conclusion Surgical resection is the first choice for the treatment of left ventricular benign tumor, and it is safe. The principle of left ventricular tumor surgery is to protect the function of ventricle and valve, prevent damage to the conduction system, and remove the tumor as completely as possible.