The invention relates to a tumor high-frequency thermal therapy instrument, and relates to the technical field of medical instruments. The tumor high-frequency thermal therapy instrument comprises a thermal therapy instrument main body, a high-frequency thermal therapy irradiation head and an internal control device. The lower side of the thermal therapy instrument main body is provided with a main body supporting bottom plate. The lower side of the main body supporting bottom plate is provided with a fixed connection block. The lower side of the fixed connection block is connected with a universal wheel connecting rod. The lower side of the universal wheel connecting rod is connected with a universal wheel fixing frame. The universal wheel fixing frame is internally provided with a universal wheel. The right side of the universal wheel fixing frame is provided with a brake lever. A storage cabinet is arranged on the main body supporting bottom plate. A storage partition plate is arranged in the storage cabinet. The right side of the storage cabinet is provided with a sealed buckling slot. The tumor high-frequency thermal therapy instrument is fully functional and convenient to use. During the high-frequency thermal therapy of a tumor patient by means of the above tumor high-frequency thermal therapy instrument, the tumor high-frequency thermal therapy instrument is time-saving, labor-saving, scientific, effective, simple, practical, safe and reasonable, thereby reducing the working difficulty of the medical personnel.