As an important reference physical quantity that can have an impact on global climate change, any slight change in Arctic sea ice will have an important impact on the local and even larger-scale climate.Due to the harsh environment in the Arctic region, the station is scarce, and the ground observation data is relatively lacking. The scope of satellite observation data covers the whole world, which largely makes up for the lack of observation data in the Arctic region. Based on the inversion data of sea ice concentration from the US Snow and Ice Data Center and the ERA-Interim reanalysis data from 1979 to 2020, this paper make use of the ensemble empirical mode decomposition method to analyze the changes of sea ice and atmospheric wind pressure during this period. The results show that: (1) The area of sea ice coverage has shown a decreasing trend in the past 40 years, and the decreasing rate is about 1.4×10^3 km^2/(10yr). Among them, the decreasing trend of sea ice concentration in the Barents Sea and Kara Sea is the most significant. At the same time, sea ice coverage reaches a minimum in the summer of September and a maximum in the winter of March. (2) From 1979 to 2014, the polar sea level pressure field showed a decreasing trend in the center of the Arctic and an increasing trend outside the Arctic, and its spatial distribution characteristics were similar to those of the positive phase of the Arctic Oscillation. At the same time, the surface wind blowing from the Atlantic Ocean to the Barents Sea has increased significantly. Considering the dragging effect of the surface wind field on the surface current and sea ice, it is speculated that the warm water from the Atlantic Ocean will increase in the Barents Sea. May cause sea ice to melt in the area.