Ash analysis provides useful information for better understanding the serious ash-related issues during utilization of Zhundong coals, while the influence of ashing temperature on exploration of ash properties of high-sodium coals is still unclear. Here, we focused on the effect of ashing temperature on physical-chemical properties of high-sodium ashes. The ash yields of high-sodium coals decrease obviously with an increase of ashing temperature, while the decrease extent is closely related to content and occurrence mode of alkali metals. Partial properties of high-sodium ashes of Zhundong coals are strongly influenced by the ashing temperature, and an appropriate ashing temperature is necessary.