This paper is mainly about contemporary French thinker Jacques Rancière's political thoughts are sorted out from the distinction between "politics" and "police" by Jacques Rancière, as well as his "part of no part" On this basis, further raise the issue and controversy of "part of non part". It means those voices that are suppressed within the community and are in "part of non part" that cannot be endorsed. Then take the current terrorist attacks in Europe as a case to reflect on Jacques Rancière the blind domain and boundary of politics and democracy in political philosophy.