Objective. A retrospective cohort study was conducted to explore the effects of comprehensive nursing based on Orem’s self-care theory on symptom improvement and pregnancy outcomes in patients with antiphospholipid syndrome (APS). Methods. Sixty patients with antiphospholipid antibody syndrome treated in our hospital from February 2019 to April 2021 were enrolled. The control group received comprehensive nursing, while the study group received comprehensive nursing based on Orem’s self-care theory. Nursing satisfaction, self-nursing ability, anxiety score, social support status, pregnancy outcome, and the score of life quality were compared between the two groups. Results. First of all, we compared the nursing satisfaction, the study group was very satisfied in 23 cases, satisfactory in 5 cases, general in 2 cases, the satisfaction rate was 100.00%. While in the control group, 11 cases were very satisfied, 10 cases were satisfied, 4 cases were general, and 5 cases were dissatisfied, the satisfaction rate was 83.33%. The nursing satisfaction in the study group was higher compared to the control group (
P
<
0.05
). Secondly, the self-concept, sense of self-care responsibility, self-nursing skills, health knowledge, and total score of the study group were higher compared to the control group (
P
<
0.05
). After intervention, the anxiety scores of the two groups decreased. Compared between the two groups, the anxiety scores of the study group before intervention and 1 week, 2 weeks, 3 weeks, and 4 weeks after intervention were lower compared to the control group (
P
<
0.05
). The comparison of social support showed that the scores of objective support, subjective support, utilization of support, and total score of social support in the study group were higher compared to the control group (
P
<
0.05
). The number of abortions in the control group was lower compared to the control group, and the number of full-term deliveries was higher compared to the control group (
P
<
0.05
). Finally, we compared the scores of life quality. After nursing, the scores of life quality of the two groups increased. Of note, the scores of physiological function, psychological function, social function, and health self-cognition in the study group were lower compared to the control group (
P
<
0.05
). Conclusion. Comprehensive nursing for patients with APS based on Orem’s self-care theory can effectively improve clinical symptoms and pregnancy outcome and play a positive role in facilitating patients’ nursing satisfaction and self-nursing ability, which can also effectively strengthen mental health and social support, this nursing model is worth popularizing in clinic.