This is a multicenter, randomized controlled, prospective clinical trial. The objective is to investigate the efficacy and safety of Tislelizumab maintenance therapy in newly diagnosed diffuse large B-cell lymphoma (DLBCL) patients after autologous hematopoietic stem cell transplantation (ASCT). 94 patients were randomly divided into two groups according to the ratio of 1:1. The whole trial included screening period (day-28 to day-1), treatment period (Tislelizumab, 200mg every 8 weeks, 12 times) and follow-up period (2 years after the enrollment).
