Four kinds of texured soils (i.e. sandy loam, light loam, medium loam and heavy loam) were experimentally oven-dried at four kinds of constant temperatures (105℃，125℃，140℃，and 150℃)with organic matter contents determined, The results indicate that the laws of their moisture losses are in general that the constant tem- peratures of 125℃is adopted to sandy loam and light loam for two hours; and the constant temperature for medium loam and heavy loam for two hours and 20 minutes, which can replace the conventional me thods of drying soil samples thereby to shorten the oven-drying time of soil samples.In comparison of soil organic matter contents in high-temperature oven-drying with natural airdcying, the absolute error is less than 0.05% so that high-temperature oven drying method will not affect soil organic contents.