The invention discloses an instrument pointer image identification method of a high-robustness rod, mainly comprising two phases including offline calibration and online identification. The offline calibration phase comprises the following steps of: collecting images, pre-treating the images, marking and learning, calibrating an instrument position, learning instrument characteristics, selecting a pointer identification method and parameters, establishing a database and storing a calibrated result. The online identification phase comprises the following steps of: collecting the images, pre-treating the images, positioning an instrument, adjusting the gray level of the instrument images, extracting the pointer and calculating readings of the pointer. The instrument pointer image identification method of the high-robustness rod, provided by the invention, is high in robustness, and has stronger robustness to the translation, the rotation and the shielding of the instrument, instrument deformation caused by light changes and different viewing angles, the change of an imaging size caused by different distances, and the like; and the pointer readings can be more accurately identified and the stable work under an actual environment is realized.