To study the effect of post abortion care (PAC) service for women of childbearing age on their contraceptive status, contraceptive mode choice, pregnancy again, and repeat abortion. Methods: 120 women of childbearing age who had unintended pregnancy and wanted to terminate their pregnancy voluntarily were selected as the research objects from May 2020 to April 2021. According to the principle of randomization, these women were randomly divided into the observation group and the control group (60 cases in each group). The women in the observation group received PAC service, and the women in the control group received routine health education. The postoperative contraceptive measures used, the postoperative vaginal bleeding time, the situation of postoperative contraception used timely, the pregnancy again and repeat abortion rate of the women were compared between the two groups. Results: There was no significant difference in the cause of this unintended pregnancy of the women between the two groups (P>0.05). The postoperative vaginal bleeding time (5.1±1.2 d) of the women in the observation group was significantly lower than that (9.0±1.1 d) of the women in the control group, the rate of postoperative contraception used timely (100.0%) of the women in the observation group was significantly higher than that (91.7%) of the women in the control group, and the effective rate of effective contraceptive measures (90.0%) of the women in the observation group was significantly higher than that (75.0%) of the women in the control group. The rates of pregnancy again (3.3%) and the repeat abortion (1.7%) of the women in the observation group within 6 months after abortion were significantly lower than those (15.0% and 11.7%) of the women in the control group (P＜0.05). Conclusion: PAC service has a positive significance for the contraceptive status, contraceptive mode choice, second pregnancy and repeat abortion of unmarried women of childbearing age, and has an obvious promoting significance for improving the quality of population.