Abstract: In order to in a large scale and high efficiently uitilize the abandoned wheat straw of the crops,a low temperature carbonized methodof the wheat straw was applied to prepare the wheat straw coal water slury with the wheat straw mixed in the good meager-lean coal sury. Thepaper had a study on an added quantity and carbonized temperature of the wheat straw affected to the coal sur features and a study on the variation of the combustion heat value and the ash fusibility.The results showed that the more added quantity of the wheat straw,the poor slurry and flowability of the coal slury would be,but the slurry stability would be improved. When the adding ratio was 1.67%,the slury concentration would be reduced about 28.25%.With the carbonized temperature increased,the surry features would be steaily inereased. After the carbonization,the lamella structure of the wheat straw would be cracked,the specific surface area would be increased,the surface oxygenic functional groupswould be reduced,the effective function points of the dispersant would be increased and the slury features of the wheat straw coal water slury would be improved. After the wheat straw added,the fusion temperature of the coal water slurry would be decreased,the combustion characteristic temperature would be reduced and the combustion activity would be increased.