A quantitative index of hydroplaning risks is proposed based on the quick access record data of aircraft and the critical hydroplaning speed. The whole taxiing process is considered. A numerical model of aircraft-tire-wet-pavement during the landing phase is established for the fluid-structure coupling analysis. The influence of water distribution on the pavement surface and the transverse shift of landing position are discussed. Case study of Airbus A320 model is then carried out. Results show that the critical hydroplaning speed during the landing phase is 12%—18% lower than that during the take-off phase. The hydroplaning accident risk is assumed to be higher. The cross slope causes uneven distribution of the accumulated water film on the pavement. The hydroplaning risk near the runway edge is higher than that near the center line area. The critical hydroplaning speed and the hydroplaning risk index are functions of the abscissa of aircraft landing position. The probability of the hydroplaning risk decreases with the increase of the transverse standard deviation of lateral distribution of aircraft landing position under the same rainfall intensity conditions. The raise of the cross slope may promote the drainage capability of pavement， while the hydroplaning risk index under the case of 2.0% cross slope is reduced by 5.1%—5.6%， compared with that under the case of 1.5%. Rain intensity shows a positive correlation with the hydroplaning risk. The risk index is raised nearly 13.1% as the rainfall intensity increased from 0.8 mm/min to 2.5 mm/min. The analyzing procedure proposed in this paper may quantitatively describe the impact of aircraft landing environment variation. The criteria standard of hydroplaning condition can be notably improved.