The content, composition and properties of the organic matters in soils under different vegetations in Wolong Natural Reserve, Sichaun Province were studied. Main results obtained are summarized as follows.1. Althoughthe the soils are under different bio-climatic conditions, their humus comositions belong to fulvic acid type. 2. Raw humus in the soils under deciduous broadleaved forests, coniferous and broadleaved mined forests and dark coniferous forests belong to fulvic acid type.The infrared spectra and ultraviolet spectra indicate that the raw humus is obviously different from "mature" humus acid. 3. The soil organic matter content is closely interrelated with the physical properties and the available nutrient of the soil.