Medicine conveying system formed by ligand polypeptide PH1 and application thereof

The invention relates to a medicine conveying system formed by ligand polypeptide PH1 and an application thereof. The medicine conveying system comprises a ligand polypeptide PH1, a medicine carrying system and at least one active substance, wherein the polypeptide PH1 is connected on the surface of the medicine carrying system. The invention also relates to the application of the ligand polypeptide PH1 in preparing a medicine capable of specifically binding tumor-related macrophage. Discovered and proved by long-time test, the polypeptide PH1 can well target tumor-related cells, induce the differentiation of the tumor-related cells and suppress the tumor growth; the composite of PH1 polypeptide lipidosome can well target the tumor-related macrophage and can be applied to target conveying of the tumor-related macrophage of small-molecular medicines and gene medicines. The medicine conveying system has the advantages that the transretinoic acid polypeptide lipidosome can induce the differentiation of the tumor