Mood swings are rapid and often extreme mood swings, fluctuating in a person's condition, involving alternating feelings of happiness and well-being and feelings of anger, irritability, or depression. Before or during the menstrual cycle there are changes in the balance of hormones in the body, which will affect the production of endorphins, serotonin, and other hormones that determine mood. The purpose of this study was to prove the effect of SEFT (Spiritual Emotional Freedom Technique) therapy on the premenstrual mood swing syndrome at Darur Ridwan Parangharjo Islamic Boarding School, Banyuwangi. The design of this research is experimental analytic pre-experimental type with a one group pretest-posttest approach. The population in this study were all female students who experienced Mood Swings with premenstrual syndrome at Darur Ridwan Islamic Boarding School, Parangharjo Banyuwangi with a total of 232 respondents. The sample is 56 respondents. Sampling in this study using Proportional Random Sampling. The instruments in this study were the SEFT therapy SOP and the FDMS (Four Demension Mood Scale) questionnaire. Data processing is done by editing, coding, scoring and data analysis with the Wilcoxson Signed rank test. This research was conducted from March 26 to May 5, 2021. The results of the Wilcoxond test obtained p value = 0.000