In the process of hematopoietic stem cell donation, nurse practitioners (NPs) navigate complex ethical challenges, including issues of autonomy, informed consent, health risks, and the balance of risks and benefits. They must navigate the delicate balance between protecting the rights of donors and meeting clinical needs, while making ethical decisions that align with both their professional responsibilities and the well-being of the donor. This paper combines case analysis and literature review to explore the ethical dilemmas encountered by NPs in allogeneic stem cell donation, with particular focus on donor autonomy, the balance between donor health and patient needs, and the transparency and completeness of informed consent. It highlights the pivotal role of NPs in ethical decision-making and proposes strategies for addressing these challenges, including the implementation of a phased informed consent process, enhanced psychological support and long-term follow-up programs, and the promotion of ethical education and professional standards. These strategies help NPs effectively manage clinical ethical dilemmas, uphold donor autonomy and welfare, and reduce external pressures. Ultimately, NPs must possess a high level of ethical sensitivity and decision-making s competence to ensure that donor rights and the decision-making process are fully protected, thereby supporting a fair, transparent, and humane clinical practice.