Abstract: The rapid pyrolysis chars of an Inner Mongolia (Neimeng) lignite were prepared in a drop tube furnace, and the coal char gasification experiments with CO₂ were conducted using a high-frequency induction furnace. The characteristics of char structure evolution during gasification were studied. Results show that as the reaction proceeds, the graphitization degree of gasified chars increases, but it is far less than the degree of natural graphite. The specific surface area firstly increases and then decreases with char conversion, while the average pore size has an opposite trend overall. The particle size of gasified chars gradually increases with conversion in the early stage, and the particle size of gasified chars increases when the conversion exceeds 74%, which could be ascribed to the cohesion of some particles in the later stage of gasification.