Abstract: In the volcanic rock area of Huzzhong in the northern part of Dahiinganling volcanic Zone, the maximum principal compressive strress of Middle-Late Juraassic were mainly oriented the direction of NW266°~316°;but one of Early Cretaceous of the direction NE12°~50°.It shows that Mesozoic stress fields were different in Jurassic and Cretaceous, but these fields are all in tensile environment. In Middle-Late Jurassic, the tectonic magma activity resulting from NNE-SSW tensile stress field in the northern part of this area formed upper Heilongjiang fault basin and NWW trending Jintao-Mengkeshan intermediate-basic volcanic belt, its induced NEE trending tenso-shear stress field made the Premesozoic basement tectonics rejuvenate and formed volcanic eruption of big area. But under the control of NE-SW tensile stress field of Early Cretaceous, in the eastern part of "Ergun Block" sag belt was formed and the basement tectonics is NE-NNE direction.