Objective To investigate the psychological pressure levels of pregnant women in late pregnancy and to analyze the influencing factors. Provide the basis for the intervention measures. Methods Totally 160 pregnant women in late pregnancy who took part in the antenatal examination were recruited and investigated using Pregnancy Pressure Scale (PPS), Pittsburgh Sleep Quality Index (PSQI), and demographic questionnaire. Results Total score of PPS was (53.06 ± 10.24) points. In order to protect the health and safety of the fetus in pregnant women caused by maternal psychological stress score ranked first in three pressure source bit highest score of (16.46 ± 5.16) points. Total score of PSQI was (7.51± 2.89) points. Compared with the different dimensions of sleep quality, the two dimensions of sleep time and falling asleep time were negatively correlated with pregnancy stress, and the rest were positively correlated. Age, pregnancy, parity, plan the actual sleep time, sleep disorders will be planned to as independent variables. In the late pregnant women psychological pressure as the dependent variable, multiple linear stepwise regression analysis, found that there are 3 variables into the regression equation: parity, pregnancy in plan, sleep disorders (P＜0.05). Conclusions Pregnant women have greater psychological pressure in late pregnancy, influenced by the conception, planning pregnancy, sleep disorders and other factors. Nursing staff should take care and guidance for the specific situation, so as to reduce the pregnancy pressure of pregnant women in late pregnancy, and better help them successfully pass the gestation period and delivery period.