Abstract: The effects of coil paction on growth，development， yield and quality of toronto in greenhouse are studied in this paper．The results show that with the soil compaction increasing，the plants grow and develop slowly，its yield，quality and flavor decline．While with the soil compaction decreasing，the plants grow and devdop well，and the fruiting node place declines，water use effidency(WUE)of leaves and yield of tomato fruits increase，the contellts of soluble sugar，soluble protein，free amino acidin fruits．increase and the quality．flavor and economic coeffidency of fruits are improved．