Abstract: Objective To study the application of large-diameter porous acetabular cup in repair of acetabular bone loss or defects during revision hip arthroplasty and summarize our experience with it. Methods Thirty-two patients (34 hips) with different degrees of Paprosky types II and III acetabular bone defects admitted to our hospital from May 2008 to April 2012 for revision hip arthroplasty were included in this study. Their acetabular bone defects were repaired with combined large diameter porous cup and bone grafts with the acetabular rotation center restored. Results The patients were followed up for 2.5 -3.67 years (mean 3.2 years).The Harris score was> 90, 80-89, 70-79 and< 70 for 18, 3, 2 and 1 hips, respectively, with an excellent and good curative efficacy of 88.6%. Conclusion The intermediate- and long-term effect of combined large-diameter porous cup and bone graft on severe acetabular bone defects is good.