The effect of sodium lactate Ringer on pregnant women is to improve the intrauterine environment and has a certain effect on promoting the blood supply to the placenta. Therefore, the use of sodium lactate Ringer IV in case of poor fetal heart variability and suspected fetal distress can achieve the effect of improving the intrauterine environment and correcting hypoxia, but of course, this situation is limited to pregnant women with mild fetal heart irregularities. If a pregnant woman has water-electrolyte disorder and the internal environment of her body is not good, it will affect the fetal heart changes of the baby. Sodium lactate Ringer is mainly to correct the water-electric balance disorder in the body of the pregnant woman and improve the intrauterine environment. If the hypoxia is indeed more serious, relying on static lactate Ringer is not enough, we should actively find the cause and terminate the pregnancy in time.