Through collecting a vast amount of the measured geostress data in Chinese mainland as so far and selecting the data which has less local impact

the geostress trend pictures with depth of magmatic rocks

sedimentary rocks and metamorphic rocks are established and the corresponding regression analysis is conducted according to the respective distribution laws. The research results show that the distribution characteristics of three kinds of rocks are different

which mainly result from the different formed mechanisms. The vertical stress is linearly increased with depth for the three kinds of rocks. The vertical stresses of all rocks nearly equal to the weight of respective overburned rocks. The maximum horizontal principal stress is also linearly increased with depth for the three kinds of rocks. Under the same depth

the maximum horizontal principal stress of magmatic rocks is maximum; sedimentary rocks middle and sedimentary rocks minimum. At the shallow depth

the ratio of the average horizontal stresses and the vertical stresses of magmatic rocks are maximum

and the ratio of metamorphic rocks is minimum. The statistic analysis results above can be useful references for the study of the macro stress field distribution and related professions.