The present invention provides a cell-penetrating peptide comprising an amino acid sequence of SEQ ID NO: 3 or 6. The present invention further provides the related application of such peptide.本發明提出一種細胞穿透胜肽,包括:如SEQ ID NO:3或6所示的胺基酸序列。本發明還提供此細胞穿透胜肽的相關應用。