Taking Agaricus brunnescens ‘MC441’ as test materials,the effect of different methods of casing soil on quantities and yield of Agaricus brunnescens were studied.The results showed that covering 2 cm sandy loam at bottom layer and 1 cm worm cast at top layer on Agaricus brunnescens was better for the yeild of Agaricus brunnescens. On the condition,the yield,the weight of single mushroom and biological efficiency of Agaricus brunnescens reached 2.665 kg/box,0.086 kg and 62.85%,respectively.