Based on considerable data a preliminary assessment of Cd,Cr,Pb,As,Hg and 3.48(a) P contents in soils and grains when calcareous clay and slightly acid soil were ameliorated with coal ash(≤600 000kg/ha) was made by the methods of pollution initial values and pollution indexes. The results show that coal ash could not cause soil and grain pollution. Through triple-cropping every two years in the simulated ash dispoal area and k_m determination, Cd,Cr,Pb,As and Hg contents were found stable in general. Though there existed week leaching or enrichment of specific element in surface or subsoil stratum, there were no great changes among layers and years.