In order to alleviate the problems of unregistered words,over translation,and missing translations in existing neural machine translation systems,a Chinese English automatic translation system based on improved data generalization was proposed.Da-ta enhancement and decoding strategies were incorporated in the process to obtain high-quality pseudobilingual sentence pairs,effec-tively avoiding the system from saving multiple models;In addition,a Chinese English machine translation model incorporating multi-ple coverage mechanisms is introduced to alleviate the occurrence of over translation and missed translation.The results show that the research method reached a stable state during the 41st and 19th iterations;When the training data sample set is 6 × At 105,the re-search method MarcoF1 had a high value of 97.8%;In the actual effect comparison,when the source language sentence length inter-val is higher than 50,the BLEU value of the research method is as high as 98.23%.The above data indicate that the research method can effectively improve the translation accuracy of Chinese English automatic translation systems,and can translate sentences of differ-ent lengths,providing a new reference scheme for the subsequent performance improvement of machine automatic translation systems.