Objective To develop a new method for the treatment of nasolacrimal duct stent (NDS) incarceration in patients with chronic dacryocystitis.Methods It was a retrospective case series study.Sixty-five patients (65 eyes) with nasolacrimal duct stent (NDS) incarceration from October 2009 to October 2011 were treated by endonasal endoscopic dacryocystorhinostomy (EE-DCR) to remove the incarcerated NDS,and meanwhile,a new lacrimal ostial expanding stent (LOES) was implanted to expand the lacrimal sac ostium.Following a 6-month follow-up after removing the LOES,the success rate of the tear drainage reconstruction was evaluated.Results Totally,51 cases with complete data were included in this study.Through the surgery,6 types of NDS with different head shapes,including diamond (21 cases),barb (12 cases),inverted triangle (10 cases),bell (4 cases),shuttle (2 cases),and ball (2 cases),were removed.In all patients,a large amount of scar and granulation tissue was found between the NDS head and the lacrimal sac wall,and within the NDS lumen,and thus the volume of the lacrimal sac was significantly reduced.In all patients,the lacrimal sac ostium was open following LOES removal.Even after 6 months,the rate of ostial opening was still 94％(48/51),and the other three patients showed scar atresia.No other complication was observed.Conclusion The combined therapy of EE-DCR and LOES implantation is an effective approach to reconstruct NDS incarceration in patients with chronic dacryocystitis,with extraordinary advantages including easy NDS removal,high success rate of Phase I tear drainage reconstruetion,minimally invasive and avoidance of facial skin scarring.