Using field investigation and indoor analysis, effects of straw decomposition agent on soil physicaland chemical properties, decomposition level of corn stalk, wheat yield components were studied. The results showedthat compared with the conventional fertilization, regular fertilization of straw, conventional fertilization + decomposi-tion + straw reduced soil bulk density and pH value, added soil nutrient content, the number of tillers in wheat, groupnumber and panicle number increased, thereby significantly improved wheat yield by 5.38% and 3.56%.