The author makes a comparative study of China-EU political relationship with the Transatlantic one from four perspectives which are High Politics（including military security and geopolitical interest），values，Low Politics and institutions. Military security is the base of the transatlantic relationship，no crucial geopolitical disputes bother the relations between the US and EU，and meanwhile Europe and US have rather similar values due to their common historical origin. However，the potential space of China-EU political relationship in the above spheres is limited.Benefited from the economic globalization，the interdependence of China and Europe has been significantly deepened in the new century. Comparing with High Politics and value，Low Politics and institution building are the two possible breaking points for the China-EU political relationships.