An anti-tumor polypeptide, having an amino acid sequence represented by FPGSDRF (SEQ ID NO: 15), X-FPGSDRF (SEQ ID NO: 16), FPGSDRF-Z (SEQ ID NO: 17), or X-FPGSDRF-Z (SEQ ID NO: 18) is disclosed. The various capital letters denote amino acids: F: phenylalanine； P: proline； G: glycine； D: aspartic acid； R: arginine； S is a phosphorylated serine residue, X and Z are an amino acid residue or an amino acid sequence, respectively, X is one selected from the group consisting of F, (R)9 (SEQ ID NO: 19), (R)9-F (SEQ ID NO: 20), 6-aminocaproic acid, 6-aminocaproic acid-F, 6-aminocaproic acid-(R)9 (SEQ ID NO: 21), and 6-aminocaproic acid-(R)9-F (SEQ ID NO: 22), Z is one selected from the group consisting of A, (G)n-RGD (SEQ ID NO: 23), and A-(G)n-RGD (SEQ ID NO: 24)； and n is an integer greater than or equal to 0.
