To analyze the effects of high ligation plus endovenous laser therapy on intraoperative blood loss, postoperative visual analogue scale (VAS) score, and complications in patients with varicosis of great saphenous vein and type 2 diabetes. About 61 patients with varicosis of great saphenous vein and type 2 diabetes treated at our hospital were included. About 32 patients (37 affected limbs) receiving conventional surgery were included in control group, while 29 patients (34 affected limbs) receiving high ligation plus endovenous laser therapy were included in study group. The intraoperative blood loss, operation time, length of postoperative hospital stay, postoperative VAS scores, blood glucose levels, Venous Clinical Severity Score (VCSS), and incidence of complications were compared between the two groups. Compared with the control group, there were less intraoperative blood loss (P < .05), shorter operation time (P < .05), and shorter length of postoperative hospital stay in the study group (P < .05). Besides, there was also lower VAS scores at different time points after surgery in the study group than in the control group (P < .05). Blood glucose levels were decreased in both groups after surgery (P < .05). Moreover, VCSS was decreased in either group at 3 months after surgery (P < .05). Blood glucose levels of patients in the study group were lower than those of the control group after surgery (P < .05). The VCSS was also lower in the study group at 3 months after surgery than in the control group (P < .05). High ligation with endovenous laser therapy for varicosis of great saphenous vein in patients with type 2 diabetes was safe and feasible.