Stem cell exosome patch and preparation method and application thereof

The invention discloses a stem cell exosome patch and its preparation method and application and belongs to the field of tissue engineering. The stem cell exosome patch comprises the following steps: stem cell is cultured and stem cell exosome is collected; a patch scaffold is prepared; and the exosome obtained is attached to the patch scaffold to prepare the stem cell exosome patch. the stem cell exosome patch obtained has natural and easily available drug sources; action site accuracy of the exosome patch can be guaranteed; effective acting time of the patch after implantation can be prolonged; and potential safety hazard can be avoided to a great extent. Through the method, the stem cell exosome patch with good biological characteristics can be obtained. The invention is a new breakthrough of establishing a biological patch in the field of tissue engineering. Meanwhile, the product also provides a feasible scheme for clinical treatment of diseases. The principle of the invention is scientific and reliable, and the technology is simple and flexible.