Abstract: The purpose of this test is to research and develop slag utilization technology,and the slag,peat,sheep droppings of available p and organic matter,total porosity,bulk density,pH value,aeration porosity,pore water physical and chemical properties,such as slag,peat,sheep dung,different ratio of matrix with the substrate were analyzed.Every 300 mL the substrate to add 4 g rich compound fertilizer,nursery substrates of Mengfei company as control,the cucumber seedling test was carried on.The results are as follows:Matrix S5(furnace∶sheep∶grass=1∶1∶1)and S6(furnace:sheep:grass=1∶1.5∶1)were best,especially the S6 can not only effectively improve the quality of cucumber seedling,cultivating strong seedling,still can reduce the dosage of lime,cucumber hole tray seedling to replace peat,seedling to reduce costs,improve the economic benefits of cucumber hole tray seedling.