Provided are a substituted
quinolone derivative as shown by formula (I), or a pharmaceutically acceptable salt and a
prodrug molecule thereof, and a pharmaceutical composition thereof, as well as the use of same in preparing drugs for the prevention and treatment of a tumor. The
quinolone derivative, salt,
prodrug molecule, and pharmaceutical composition thereof can be used as a
protein kinase inhibitor, which is effective in inhibiting the activity of
AXL protein kinase, and is capable of inhibiting the proliferation, migration and invasion of various
tumor cells; and can be used in the preparation of anti-tumor drugs, especially drugs for treating hyperproliferative diseases such as a tumor in human beings and other mammals.