Objectives: Part I analyzes the clinical characteristics of JO-RRP and AO-RRP. Part II explores the influencing factors of surgical intervals. Methods: Part I: Clinical features were analyzed in 168 RRP patients (59 JO-RRP and 109 AO-RRP) diagnosed and treated in our hospital. Part II: The correlation of interoperative time with onset age, gender, Derkay anatomical score or surgical methods were analyzed in JO-RRP patients. Results: The interoperative time between operations in the JO-RRP group was 116.3±75.9 days, and in the AO-RRP group was 169.1±141.7 days (p<0.05). In the JO-RRP group, the CO2 laser treatment interval (186.2±140.1 days) was significantly longer than that of the microdebrider group (124.7±114.5 days) (p=0.011). Conclusions: 1. JO-RRP patients had higher Derkay score, higher surgical frequency and shorter surgical interval. 2. The surgical intervals lengthened with age and shortened with higher Derkay scores. CO2 laser surgery has the longest interoperative time.