In today's mainstream American literary world, Ha Jin is the most famous and most well-known Chinese writer. His novels have won many important awards, which can be regarded to represent the highest achievement of contemporary American Chinese literature creation. His work has had a wide impact throughout the world. This article focuses on the analysis of Ha Jin's Nanjing Requiem and Waiting from the traumatic fi eld of view. He used the writing methods mentioned in the trauma theory to reproduce the suff erings of the old society and the atrocities of the aggressors based on the traumatic writing techniques. First, through the analysis of the fragment of Waiting, it shows the loss of individual humanity and the suppression and injury brought by social reality after the protagonist experienced the marriage dispute in the old China. This has caused the article to rise from personal trauma to social trauma. This not only shows the protagonist's spiritual dilemma and psychological struggle, but also triggers the reader's philosophical thinking on human nature and society. Then, we analyzed the Nanjing Requiem. This paper uses a multi-faceted perspective to describe the Nanjing Requiem. The article mainly reproduces the tragic fate of the people in the disaster from the perspective of the Westerners. The personal trauma of the article has risen to the collective trauma brought about by the Second World War. Finally, we analyze Ha Jin's writing style as a new immigrant writer based on the works in these two traumatic perspectives. We can conclude that Ha Jin recreates the wound by means of traumatic writing to heal the wound to some extent. In addition, the language choice in the early days of Ha Jin's creation was to cater to the needs of the readers and maintain their own livelihoods. The realistic descriptions in his works are derived from his own life history and human experiences. This coordination of catering and realism has resonated with Chinese immigrants and catered to the expectations of American readers for Chinese literature. We can say that his success is inseparable from the coordination of the two.