Kit for constructing humanized flora mouse model

The invention discloses a kit which comprises a broad-spectrum antibiotic composition, human intestinal flora, dietary fiber pectin and an intragastric administration device. By adopting the kit, a humanized flora mouse model can be constructed, and a tumor model is constructed on the basis of the humanized flora mouse model and is used for screening or evaluating an immune checkpoint inhibitor. 本发明公开了一种的试剂盒，其包括广谱抗生素组合物、人类肠道菌群、膳食纤维果胶、灌胃器具。采用该试剂盒可构建人源化菌群小鼠模型，在此基础上构建肿瘤模型，用于免疫检查点抑制剂筛选或评价。