Digital image correlation (DIC) technique based on band-pass filtering imaging for full-field deformation measurement of high-temperature objects is proposed. The DIC technique employs a narrow band-pass optical filter to alleviate the influence of thermal radiation of high-temperature sample on the captured images. As a result of this approach, high-quality digital image of the test sample surface at 1000 ℃ can be acquired and can be directly processed by DIC to extract full-field deformation. The full-field thermal deformation and coefficient of thermal expansion of a chromiumnickel austenite stainless steel sample at the temperature range of 16.5 ℃~1000 ℃ are measured to verify the proposed technique. Experimental results clearly indicate that the proposed technique can achieve high-accuracy measurements with simple principle and implementation, and is expected to find more engineering applications.