The invention belongs to the field of gene engineering, and relates to chimeric antigen receptor of anti-human CD19 antigen and application thereof. The chimeric antigen receptor of anti-human CD19 antigen comprises polypeptide (scFv) for recognizing human CD19 antigen, a hinge region, a transmembrane region and an intracellular signal domain which are connected in sequence, wherein an amino acid sequence of the polypeptide (scFv) for recognizing human CD19 antigen is as shown in SEQ ID NO.1, SEQ ID NO.2, SEQ ID NO.3 or SEQ ID NO.4. The chimeric antigen receptor can be more stably expressed in T lymphocyte, has the capacity for properly removing cancer cell, can not only maintain the positive rate of CD19 targeted chimeric antigen receptor during the cell culture of a patient, but also enhance the capacity for CAR-T multiplication and tumor killing, does not have toxic and / or side effects on antigen-negative cell, and can be applied to the targeted therapy of tumor.