Objective To investigate the diagnosis and treatment of primary splenic tumor. Methods The clinical data of 58 patients with primary splenic tumor from January 2006 to December 2014 were retrospectively analyzed. Results 45 cases were benign splenic tumor, including 21 hemangioma, 11 splenic cyst, 8 lymphangioma, 3 littoral cell angioma, 1 hamartoma and 1 sclerosing angiomatoid nodular transformation of spleen. 13 cases were malignant splenic tumor, including 12 lymphoma and 1 angiosarcoma. Ultrasound and CT were the main diagnostic methods. 51 cases underwent splenectomy, including 23 open splenectomy and 28 laparoscopic splenectomy. 5 cases underwent partial splenectomy and 2 splenectomy combined distal pancreatectomy. There had no postoperative complications. The follow-up period was 9 months to 9 years. 41 cases with benign splenic tumor had no recurrence or metastasis. The 1-, 3-, 5-years survival rate were 81.8%, 63.6% and 27.2% respectively of 11 patients with malignant splenic tumor. Conclusion The diagnostic of primary splenic tumor mostly rely on clinical features and imagic examination. Surgical resection is not only an effective treatment, but also a confirmed diagnosis method for primary splenic tumor. Partial splenectomy is a reasonable procedure for local benign splenic tumor. Early surgery, combined adjuvant chemotherapy and radiotherapy are important for improving the prognosis of malignant splenic tumor.