Abstract: The formation of Crescent moon poem school was the result of many factors working together:At that time,many deficiency in the new poem's produce aroused people's discontentment and poets'attention to the form of new poem.the factor of times and the law of poetry's development make it possibility.Adding the learning and talent of Wen Yi-duo and his comrades and their enthusiasm on groping form beauty of new poem,a poem school aiming at seeking for poem beauty set up like a Crescent moon and light the sky of poetry world.