Abstract: Xi Jinping's reform thought, from theoretical source, stems from scientific methodology of Marx and Engels' reform thoughts, and theoretical support of Mao Zedong and Deng Xiaoping's reform thoughts. The Communist Party as the Party in power, sharing responsibility and being prepared for unexpected development, indicates the direction for deepening the reform. From practice, his individual growth and political experiences initiate his reform thoughts, and the present status quo in China enriches and develops his reform thoughts possibly. Xi Jinping's reform thought shares the features of creativity, contemporaneity, practicalness and systematical, comprehensive and dialectical features etc.