PURPOSE: A producing method of a mushroom culture medium containing mushroom waste culture soil and food compost is provided to improve the weight and the number of effective stems of a mushroom fruit body. CONSTITUTION: A producing method of a mushroom culture medium comprises the following steps: mixing mushroom mycelia remained after culturing mushrooms with rice bran or saw dust to obtain mushroom waste culture soil; composting food waste to obtain food compost; and mixing the mushroom waste culture soil and the food compost in a weight ratio of 1-9:9-1. The mushroom waste culture soil is the waste culture soil obtained after culturing Pleurotus ostreatus. The water content of the mushroom culture medium is controlled in 55-85wt%. [Reference numerals] (AA) Experimental group; (BB) Growth amount of mycelia; (CC) Fruit body; (DD) Control group1; (EE) Control group2; (FF) Comparison example1; (GG) Comparison example2; (HH) Comparison example3; (II) Comparison example4; (JJ) Comparison example5; (KK) Performance example1; (LL) Performance example2; (MM) Performance example3; (NN) Performance example4; (OO) Performance example5본 발명은 버섯을 재배하고 남은 버섯균사체, 톱밥 또는 쌀겨를 포함하는 버섯 폐배지를 수득하는 단계; 음식물류 폐기물을 퇴비화하여 음식물 퇴비를 수득하는 단계; 및 상기 버섯 폐배지와 상기 음식물 퇴비를 9 : 1 ~ 1 : 9의 중량비로 혼합하여 버섯 재배 배지를 제조하는 단계를 포함하는 것을 특징으로 하는 버섯 재배 배지의 제조방법을 개시한다.