Freeing the mind is the essential request of the Party’s ideological principle and also the important magic weapon for the development of socialism with Chinese characteristics.It should be understood more deeply in the new era.Firstly,we should fully understand the connotation of freeing the mind by combining China’s forty years of development and changes.Secondly, we should comprehend the times value of freeing the mind through four aspects: it is the basic requirement of dialectical materialist epistemology,the important ideological weapon of the Party’s construction and the powerful tool for practical work, the driving force for social development as well as the key to the realization of Chinese Dream. Finally, we should grasp the realistic dimension of freeing the mind from four aspects insisting on seeking truth from facts serving for development keeping up with the times and satisfying the people which can help achieve the Two Centennial Goals and realize the Chinese Dream of the rejuvenation of the Chinese nation in the end.