Quantitative investigations of soil Oribatid mites in the Hebanshan national forestry park were made in May, August and November of 2001. 7 collecting sites were set according to the vegetation, altitude and landform, 3 site were on the top, 3 in the middle and one at the foot of the mountain. Sites at the same altitude were set in the different vegetation area. 5 samples were taken each time from each studying site with size as 200cm3. Results as follows: 2742 individuals from 41 genus belonging to 31 families of Oribatid mites were collected totally, There were 2 dominant genus, 3 subdominant genus, 19 common genus and 17 rare genus of Oribatid mites in this studied area. Composing and Quantitative of the Oribatid species among the different studying sites were quite different. There were 31 genus at site Ⅰ, 23 genus at site Ⅱ; Site Ⅲ had the highest density, 1.3 timed the average density, up to 8450 individuals/m2, while site Ⅳ hadthe lowest density as only 4583 individuals/m2, that was only 0.7 times of the average density. Seasonal fluctuation of the Oribatid mites abundance was obvious. Density in spring took the first place, autumn followed and summer took the last. The lowest density of the Oribatida in the Summer probably related to the seasonal high temperature and aridity in this area. The mites were classified in to M, P and G group based on their morphologic characteristics. If P species in the community was more than 50% of the total individuals, then the community was defined as P type, M and G type got the same definements, if each M, P and G group in the community was more than 20% but less than 50% of the total number, then the community was defined as O type. Based in the results the structure of soil Oribatida community of Hebanshan national forestry park was O and P type, the species and number of P-group were much more than those of the M and G group. Oribatida of the Hebanshan National Park community had high heterogeneity and diversity reaching 4/5 of most diversity index but had low dominance and uniformity. The similarities among the 7 sites were obvious, moderate similarities occurred among a minority sites. Different results were got using two different clustering methods, which mean the vegetation type and altitude could affect the community structure of the Oribatida but affect its quantitative distribution a lot.