When you are in a bad mood and always want to cry when you are pregnant, accompanied by symptoms related to low mood, delayed thinking reaction, reduced volitional activity, poor sleep quality, low self-evaluation and self-guilt and self-blame, you should suspect pregnancy depression. Throughout pregnancy, the ovarian function of women changes more, especially during pregnancy, the patient’s hormone level fluctuates significantly, which may lead to mood changes, which is also the reason for the appearance of Bad mood and constant crying are the reasons. Meanwhile, during this process, if influenced by external factors, family environment, social factors and other related factors, the possibility of pregnancy depression is greatly increased. Therefore, if the above symptoms appear during pregnancy and a clear diagnosis of pregnancy depression is made, intervention should be carried out quickly, especially psychological intervention is very important, which has obvious benefits for the psychological, physiological and all aspects of somatic changes of pregnant women throughout pregnancy, so it is recommended to Early diagnosis and early intervention of psychological treatment.