A large number of community discovery algorithms have been proposed in the last decade. Recently, the sharp increase of network scale has become a great challenge for traditional community discovery algorithms. Label propagation algorithm is a semi-supervised machine leing method,which has linear time complexity when coping with large scale networks. However, the output result has less stability and the quality of the output communities still remains to be improved.Therefore, we propose a novel coreleader based label propagation algorithm for community detection called CLBLPA. Firstly,we find core leaders of potential community by using a greedy method. Then we utilize the label influence potential to guide the process of label propagation. Thus we can accelerate the convergence of algorithm and improve the stability of the output. Experimental results on synthetic datasets and real networks show that CLBLPA can significantly improve the quality of the output communities.