Preparation method of oxytocin injection

The invention provides a preparation method of an oxytocin injection. According to the preparation method of the oxytocin injection, through control over the temperature in the preparation process anda nitrogen introduction mode and accurate adjustment for the pH value, chlorbutol in the injection is more stable and cannot be easily subjected to oxydative degradation and volatilized, and the oxytocin injection well corresponding to the labelled amount on a prescription is obtained and has practical application and popularization value. 本发明提供了一种缩宫素注射液中的制备方法，本发明缩宫素注射液的制备方法，通过控制制备过程中的温度，通入氮气的方式及精准调整pH值，使注射液中的三氯叔丁醇更稳定，不易被氧化降解、挥发，得到与处方标示量对应性好的缩宫素注射液，具备实际应用推广价值。