Background: Proliferative glomerulonephritis with monoclonal IgG deposits (PGNMID) in renal allografts is a rare, renal-limited disease. No study has reported the long-term outcomes and prognostic features of PGNMID in renal allografts in the Chinese population. Methods: We retrospectively included transplant patients diagnosed with PGNMID who underwent renal allograft biopsy at three transplant centers from April 2012 to July 2020. We observed the clinicopathologic features, explored the long-term graft survival, and investigated the characteristics associated with the prognosis. Results: A total of 13 transplant patients with PGNMID were included, out of 3821 biopsies. The mean follow-up time was 55 months since kidney transplantation (KTx). At diagnosis, all patients presented with proteinuria (100%) and most of them with hematuria (92%). IgG3κ (69%) was the main immunofluorescence (IF) subtype. The median graft survival of the total cohort was 17months from diagnosis and 49months from kidney transplantation. During follow-up, 9 patients needed dialysis and 2 out of 9 patients who progressed to dialysis died of infection. Primary membranoproliferative glomerulonephritis (MPGN) (P= 0.014) and MPGN pattern at diagnostic biopsy (P< 0.001) were associated with a higher risk of graft loss. Conclusions: The long-term outcome of allograft PGNMID was relatively poor in the Chinese population. Primary MPGN and MPGN pattern in renal allograft were associated with poor outcomes. Graphical abstract: