In order to rapidly increase the degree of maturation of the soil in land reclamation of the refuse dump of the Haizhou open-pit mines, the application of waste mushroom in the process of soil improvement in the dump was studied. Through the research on plant growth, root development and microbial changes in soil and change of physical and chemical characteristics of the plot, the result shows that waste mushroom can increase the degree of maturation of the soil and improve soil fertility.