In this study,tomato residues and cow dung was composted in high temperature compost system for 30 d,in order to study on the feasibility of tomato residues composting and nursery media in tomato seedling.C/N of initial complex material was 25.The results showed that,the temperature of at least 55℃maintained for 9 d was enough to kill pathogens.pH showed increased firstly then decreased in a alkalescency.EC rose up firstly and then declined in the range of 4～5 mS·cm-1.At the end of composting,the ratio of C/N decreased to under 20,and germination index rose to 61%,which were paralleled to standards of compost maturity.Tomato grew well in the mixtures of tomato residues and vermiculite,based on the morphological indexes,such as plant height,stem diameter and seedling index.A mixed substrate of tomato residues with vermiculite (1∶4,volume)was the best in tomato seedling.