Postpartum depression refers to women’s obvious depressive symptoms or typical depressive episodes during the puerperium, which is a puerperal psychiatric syndrome along with postpartum dysphoria and postpartum psychosis. The causes of its onset mainly include the following aspects: 1. hormonal influence, after the birth of a pregnant woman, the body hormones change greatly, which can lead to emotional depression; 2. due to the role change, maternal psychological burden increased, poor sleep quality, physical weakness, perinatal life environment closed, life habits change, etc. easily lead to the occurrence of postpartum depression.