The flying time variability considered is based on the change of cruise speed, and the flight personnel pairing problem is studied from the tactical planning stage. Taking the minimum basic operation cost and maximum robustness as the goal and improving costing, the robust crew pairing model with number-based measure(RCPN ) improved model is established, the number of deviated flights and non-deviated flights is proposed as the robust index for evaluation, and the column generation method is used to solve it. Comparing the manual calculation results with the RCPN model results, the results show that the average operating cost of the RCPN model is reduced by 3.9% compared with other average operating costs.This model can improve the robustness of the solution by 21% while increasing operating costs by 3.9%, and the model can avoid extreme flight delays. It can provide reference and decision support for airline scheduling personnel.