Objective To investigate the effect of refined management on the reducing of the rate of delayed connection of thoracoscopic lung nodule surgery in day surgery. Methods Patients scheduled for thoracoscopic lung nodule surgery admitted to Daytime Medical Center of Deyang People’s Hospital from January to December 2022 and September 2023 to August 2024 were retrospectively selected. Patients admitted between January and December 2022 were divided into the pre-fine management group, while those admitted between September 2023 and August 2024 were divided into the post fine management group. The incidence of delayed connection of thoracoscopic lung nodule surgery in day surgery was compared between the two groups. Results A total of 888 patients were included. Among them, there were 419 cases in the pre-refined management group and 469 cases in the post refined management group. There was no statistically significant difference in the basic information between the two groups (P>0.05). In the pre-refined management group, 28 cases were delayed, the rate of delay was 6.68%. In the pre-refined management group, 7 cases were delayed, the rate of delay was 1.49%. There was a statistically significant difference in the occurrence of delayed reception between the two groups (χ2=15.744, P<0.001). Before refined management, the incidence of delayed reception caused by the patient’s own reasons and medical factors accounted for 28.57% (8/28) and 71.43% (20/28), respectively. Among them, the proportion of four factors was relatively high: preoperative examination imperfect and unqualified, anesthesia assessment not completed on time, surgical scheduling changed at will, and patients did not prepare for surgery according to the requirements. After refined management, the incidence of delayed reception caused by the patient’s own reasons and medical factors accounted for 71.43% (5/7) and 28.57% (2/7), respectively. Conclusion Refined management of daytime surgery is an effective measure to reduce the rate of delayed of thoracoscopic lung nodule surgery in daytime surgery.