Complex fracture network formed by fracturing is the key of unconventional reservoir stimulation，and the fracture initiation and expansion are mainly controlled by the ground stress field distribution. So the fracture local stress disturbance law of the horizontal well fracturing is necessary to be studied. A calculation model of the near wellbore fracture local stress composed of the horizontal wellbore stress concentration and fracture-induced stress was established. Finite element numerical simulation software Comsol Multiphysic was used to simulate and to analyze the stress distribution situation，and the influence law of the disturbance factors including the fracture net pressure，fracture length，fracture number and spacing on the local stress field was revealed. The result shows that the disturbance degree of the near wellbore fracture to the minimum horizontal principal stress is more significant. Among the factors，the fracture net pressure and number have a positive impact on the disturbance amplitude of the local stress field. The increase of the fracture length is mainly reflected in the increase of stress disturbance range. And the increase of the fracture spacing makes the decrease of the stress interference degree among fractures.