Abstract: The relation between characteristic of Zalainuer lignite char and char-making temperature was studied.The results showed that with the increasing of char-making temperature,m(C)/m(H) and density of the coal char rose monotonously while the total specific area increased firstly and then declined.Carbon structure in coal char did not change obviously but the distribution of minerals,aggregation state and chemical configuration changed evidently.When the temperature increased,coal char burning activity and reactivity with carbon dioxide declined monotonously.