A chimeric antigen receptor targeting to CD47, its encoding sequence, and its modified immune response cells, and the preparation and application thereof. The present invention constructs a chimeric antigen receptor targeting to CD47 and its modified immune response cells based on the SIRPα molecule, and the novel modified immune response cells can effectively target a variety of tumor cells, and can be used to prepare preparations for the treatment of tumors, especially the preparations for inhibiting the expression of CD47-positive tumor cells. The preparation of the modified immune response cells of the target CD47 is easy, and the modified immune response cells of the target CD47 have high killing rate on tumor cells.
