Abstract: In order to research the iscthermal gasication charactersics of char with acdtton ofpich.the programed temperatre funace was used to study the influence of fiferent plith addition ratio on gas cal char under diferent temperatures which was 1 050,10 and1 150 ℃C.The Vvolume Model. hrnking Core lModel andRandon Pore Model were used to fit the gasificatio reaction kineics data The resuts showed that withthe increase of the temperaturecke gasicaion reacivty in reased. Meanwhile,wth the increase adtion ofpitch.thereactivitydecreased. Nhen the ratio of pich increased from 3% to 6%.the gasication reactity index R dec,eased dranatcall, The resuts aiso showed that Random Pore Model fited best with the kinetios data, and it emonstrated that coal g asihication reacion meet the Random Pore Model reaction mechanism. The gasificatio reacion activation energy caculated by Random Pore Model of char which was added with 3%,6%and 15% ptichwas 50.15,57.16,75.61 k J / mol separately. With the increase addition of pitch,the reactivity of the coke decreased.