A small amount of vaginal bleeding, followed by paroxysmal lower abdominal pain or back pain, with no opening of the uterine orifice on pelvic examination and no discharge of pregnancy, before the 28th week of gestation, is what we call “pre-eclampsia miscarriage”. If the symptoms continue to worsen without relief, it is likely to develop into a refractory miscarriage. Most of the symptoms of preterm miscarriage are usually vaginal bleeding at the beginning. If a pregnant woman experiences a small amount of bleeding or a large amount of bleeding with strong abdominal cramps, especially constant pain in the pelvic abdomen or the lower part of the back, or a significant drop in the lower back and abdomen, this is a clear indication of preterm miscarriage and should be seen by a hospital promptly. First of all, ultrasound should be done to confirm that the fetus is healthy, then find out the reason for the occurrence of pre-eclampsia miscarriage as far as possible, and make corresponding treatment for the reason, no matter which method of treatment is taken, after the occurrence of pre-eclampsia miscarriage, absolute bed rest is very necessary, after rest and fetal preservation treatment, the bleeding has stopped, and if the fetus develops normally, generally speaking, there is no major impact on the fetus, and the pregnancy can continue. In conclusion, there are often many reasons for preterm miscarriage. If the preterm miscarriage is caused by the fetus itself, it is advisable to abandon this fetus. If it is caused by other reasons, you can undergo fetal preservation treatment and actively exclude bleeding factors.