Because of the same theme, the emotions and techniques in the poems are similar. Therefore, when we read poetry, we can start with the theme and achieve the effect of "reading a poem and knowing a poem". According to the classification of subject matter, China's ancient poems can be divided into several types, such as homesickness poems, love poems about in my heart forever, poems about history, poems about things and wishes, poems about giving people away, poems about frontier wars, and pastoral poems. Of course, it is difficult for these poems to have clear boundaries. When reading, we should not only grasp the general theme of poetry, but also spend time accurately grasping and understanding the content of poetry.