The Easy Path Depending on Other-power ( to-li-i-hsing-tao, 他力易行道 ) in Tan-luan’s Ching-tu-Lun-chu had impacted on the Pure Land Buddhism in Chinese and Japan of the past.Tan-luan’s Ching-tu-lun-chu is a commentary on Vasubandhu’s Ching-tu-Lun.The question is if Tan-luan, under the background of Buddhism in Pei-wei Dynasty, completely succeeded to the pure land thought and practice proclaimed by Vasubandhu’s Ching-tu-lun? This study focus on Tan-luan’s Ching-tu-lun-chu and Vasubandhu’s Ching-tu-lun ,and compares the pure land theory in Tan-luan’s Ching-tu-lun-ch with the theory in Vasubandhu’s Chings-tu-lun. There are five chapters in this study. The first chapter includes the motive for this study, the harvest of modern Buddhist research, the intended outcome of this study, the problem of materials, and the structure of this dissertation.The second chapter explores the thought and practice involved in Vasubandhu’s Ching-tu-lun. The Third chapter make clear the thought and practice involved in Tan-luan’s Ching-tu-lun-chu.The forth chapter compares the thought and practice in Ching-tu-lun with the thought and practice in Ching-tu-lun-chu according to the research result of the second and third chapter. The fifth chapter gives a conclusion and the directions of the further study in the future. The result of this study proclaims that: although Ching-tu-lun and Ching-tu-lun-chu both have the same ultimate goal, attainment of anuttarasamyaksambodhi, and both acknowledge the incredible function of Amitayus’s vows, but because of the difference of the motive for their writing and the sutras and commentaries they depended on , there are striking contrast in the practice and thought between Ching-tu-lun and Ching-tu-lun-chu.