Thermal influences of climate systems on Arctic sea-ice concentration (SIC) variability have been well documented at multi-time scales, whereas dynamic impacts remain unclear. Here, we found that the autumn Tibetan Plateau (TP) snow cover increment exerts dynamical effects on interannual variation of the subsequent spring Arctic SIC. Our results indicate that the autumn TP snow cover increment improves more than 30% standard deviation in much of the TP. Heavier TP snow cover increment leads to stronger TP cooling and disturbance along the subtropical westerly jet, thereby inducing a hemisphere-wave train and an anomalous Arctic cyclone. At the flank of this cyclone, anomalous wind and wind stress result in the equatorward Ekman transport and promote outward movement of Arctic SIC, favoring the negative Arctic anomalies. Our results suggest that the better climate effect could be reflected by the variable of the TP snow cover increment, which is important for seasonal projections of Arctic SIC variability.