Poems on the wall are not uncommon in China's classical poems. Wang Shu's Poem on the Wall in Prison clearly takes' friends' as the reader, which secretly conveys double meanings: first, the poem written for friends actually needs the wall, indicating that the poet is trapped in a dark and humid prison and lost his freedom; Second, it also shows the determination to die generously for the sake of national justice and the confidence that victory will eventually come. The mood of the poem "The Wall of Prison" changes from grief and indignation to tragic and then tragic, which truly conveys the poet's mood in the face of death and reflects the spirit of the whole Chinese nation's struggle to the death with an individual's situation and mood.