With the increase of arrival and departure traffic at the airport, the leveling in the departure stage caused by traffic control limits have caused unnecessary fuel consumption for aircrafts and brought economic losses to airlines. In order to reduce level flight and achieve rapid departure, the continuous climb operation (CCO) based on performancebased navigation (PBN) mode has became a way to solve this problem. The construction method of the BADA aircraft performance model is introduced, the CCO is designed using the performance model, and a conflict resolution method is proposed. The climb time and fuel consumption are calculated according to an actual flight profile. The simulation results show that CCO departure can shorten the climb time and reduce fuel consumption, and the adjustment of speed is better than using step climb when a conflict happens.