Due to the growth of China's social economy and culture, the demand for psychology is becoming more and more urgent. Environmental health is the unity of people's behavioral health that constitutes the environment and environmental conditions that meet people's basic needs. In this paper, the improved a priori algorithm is combined with English-Chinese bilingual classroom of university students' psychology. It is based on the collected data and basic information of university students' psychology, which provides ideas for the construction of English-Chinese bilingual classroom and teaching platform of psychology under the background of environmental health. The consistency test results show that the consistency between the proposed algorithm and the manual processing method can reach over 96.5%, that is, the accuracy of the algorithm is over 96.5%. Compared with the traditional a priori algorithm, the improved a priori algorithm has a higher recognition accuracy, with the accuracy increased by 21.36% and the recall increased by 13.99%.