Abstract: There are 34 poems,which have differences between Xu and Zhuan in Mao' poems.Some are incompatible,some are not corresponding,and some are not involved.The different causes are various; The explaining emphasis between Xu and Zhuan is different;Xu is unclear and self-contradictory;Zhuan misreads lection;Xu and Zhuan have different documentary sources;Continued Xu and Zhuan all expound from the first Xu,but have different viewpoints;Zhuan revised some Xu;Xu and Zhuan have been added.