[Objective] The objective of the study is to compare the effects of planting sedum plants in green roof substrates made of crushed brick and ceramsite in order to provide the reference for related research.[Methods] With two types of extensive green roof substrate mixed by using 5% distillers' grains, 10% top soil, 25% sand, compound fertilizer(4 kg/m³) and 60% ceramsite, or 55% crushed brick and 5% lime stone, we planted two popular Sedum species(Sedum sarmentosum, SS; Sedum Linare, SL) in them, and then investigated coverage and dry weights of plants, and nutrient content(total nitrogen, TN; total phosphorus, TP; and total kalium, TK) in substrate within 18 months.[Results] Plant coverage and dry weights from substrate made of crushed brick were greater or equal to those from substrate made of ceramsite, while the decreases of TP and TK in two substrates did not differ from each other significantly, TN in substrate made of crushed brick reduced less than substrate made of ceramsite. The coverage and dry weights of SS were significantly higher than those of SL.[Conclusion] Green roof plants grow better in the green roof substrate made of crushed brick than substrate made of ceramsite, and thus can replace ceramsite in mixing green roof substrate.