Mainly aiming at the technical problem that there are inadequacies in the existing departure delay prediction analysis for the operation conflict between aircrafts on the airport surface, the invention presents a taxiing delay time and departure delay time prediction method based on multiple conflict modes of taxiing on the airport surface. The departure delay is divided into two parts according to the departure process, namely, taxiing delay and departure queuing delay. The influence of various forms of surface taxiing conflict is considered in detail in the calculation of taxiing delay. Therefore, the prediction of the total departure delay is more realistic.