When the Qing Dynasty faced difficulties under the reigns of Tongzhi and Guangxu, the pro-Song trend arose in opposition to Wang Shizhen's "theory of romantic charm," ShenDeqian's "theory of character," and "Tongguang form" that does not conform to the high Tang." Among them, the Tongguang form of Min School represented by Chen was the mainstream. This paper uses Chen Yan's selections of poetry by Su Shi and Wang AnshiinSong Shi Jing Hua Lu to explore the possible political factors for the formation of Chen Yan's Tongguang form poetic theory,and the background factors similar to the poetic style to that of Yuanyou, in the three dynasties of Kaiyuan, Yuanhe, and Yuanyou from Tang and Song poetry. This paper first explains the creative background of Chen Yan's Song Shi Jing Hua Lu, further comparing the dynastic background factors in "Tongguang form" and "Yuanyou form," then uses the poems by Wang Anshi and Su Shi selected by Chen Yan to discuss the political message in these selections, in order to gain the political background clues about the formation of the "Tongguang form" assertions, and to understand Chen Yan's discussion in Song Shi Jing Hua Lu of Wang Anshiand Su Shi in not criticizing Xining Reforms being the same as supporting the reforms. Finally, this paper concludes that the political position of the selection Song Shi Jing Hua Lu means a support of Xining Reforms. This paper also supplements Chen Yan's mistaken view that Wang Anshi's "Ti Xi Tai Yi Gong Bi ErShou" was written after he was removed from his post as prime minister in Song Shi Jing Hua Lu,and the misplacement of "Ming FeiQuErShou" as written under the reign of Shenzong. This paper also corrects Mr. Cao Zhongfu's accounting of the number of works by Su Shi collected in Song Shi Jing Hua Lu