【Abstract】In this paper, the psychological stress of the firstline medical staff involved in the treatment of new coronavirus (2019ncov) pneumonia patients was analyzed. It was found that the medical staff had a high level of perception of risk factors, played a lot of roles and had a heavy task. Compared with the routine nursing work, the work intensity was high after wearing the protective clothing, the front line was long, the expectation of the medical staff was high, the patient's mood fluctuates greatly, and the expectation was high. According to the above reasons, some suggestions are put forward in order to provide help for the mental health construction of the firstline medical staff in the treatment of new coronavirus pneumonia.