The invention relates to a fusion protein, in particular to a double-target fusion protein containing an immune globulin Fc portion. The double-target fusion protein comprises a first polypeptide, a second polypeptide and a third polypeptide. The first polypeptide contains GLP-1 or other analogues, the second polypeptide contains an IgG4Fc portion, and the third polypeptide contains FGF21 or a variant thereof. The first polypeptide is connected with the second polypeptide through a first joint, and the third polypeptide is connected with the second polypeptide through a second joint. The fusion protein has mutation sites different from those of existing disclosed infusion proteins, is high in stability and remarkably prolonged in half-life period and gives play to synergistic effects in blood glucose reducing, lipid lowering, weight losing and the like.