According to the analysis of the slag which were discovered in Buriram’s municipal area, were analyzed by use of Energy Dispensive X-Ray Fluorescence. The results were as follows: kinds and quantity of element found in the slag at different depths ,from seventeen samples, it was founded that the highest found quantity was oxygen (37.40-48.55%) and the lesser was iron (7.842-44.34% by weight), kinds and quantity of elements found in the slag in two different depths founded that kinds and quantity of elements in few samples were approximately the same, At the same level of depth, kinds and quantity of all elements were approximately the same.