Stable anti-PD-1 antibody pharmaceutical formulation and its application in medicine. The anti-PD-1 antibody pharmaceutical preparation contains an anti-PD-1 antibody and a buffer, may further contain at least one stabilizer, and may optionally further contain a surfactant. The anti-PD-1 antibody pharmaceutical preparation of the present invention can effectively suppress antibody aggregation and amide degradation, thereby preventing the degradation of the antibody product and obtaining a stable injectable pharmaceutical preparation. [Selection figure] None安定な抗PD-1抗体医薬製剤および医薬におけるその適用。抗PD-1抗体医薬製剤は、抗PD-1抗体、緩衝剤を含み、更に少なくとも1種の安定剤を含んでもよく、任意に更に界面活性剤を含んでもよい。本発明の抗PD-1抗体医薬製剤は、抗体凝集およびアミド分解を効果的に抑制でき、それにより抗体製品の分解を防止して安定な注射医薬製剤が得られる。【選択図】なし