The European Union underwent a series of political crises and troubles in 2016. A multiple of crises including the refugee crisis led to political turmoil in a number of European countries，which exaggerated the potential risks of political crisis. The European countries，especially the west European countries，encountered a variety of political challenges. In respect of party politics，severe damages were inflicted on the mainstream political parties and significant impacts effected upon the traditional pattern of party politics. The consistent upsurge of the anti-establishment forces will have profound and lasting influences on the party politics in Europe. Such an uncertain and instable situation resulted in a rising Eurosceptic sentiment，of which Brexit was the most outstanding illustration. In view of this，the leaders of the EU and member states have to rethink and reorient the future European integration.