The year 2015 witnessed great development in China-Iran relations in political，economic，military and cultural areas as well. China also contributed greatly to global efforts breaking Iran nuclear deadlock. China provided for strong political support for the solution of the issue by negotiation；China also put forward feasible proposal for the solution of some technical problems. The progress in nuclear issue will facilitate China-Iran political and economic relations while posing new challenges as well. The challenges may include Iran’s some domestic discontent against China，potential interference by the West and Iran’s domestic discrepancy regarding its relations with China.