The utility model discloses a self-anchoring packer for petroleum industry, which is used in separate injection wells, meets the sophisticated layer separation of the injection well, prevents an injection string from wriggling, and prolongs the validity term of packer setting. The self-anchoring packer comprises an anchoring part and a sealing part which are connected through an upper rubber base and mounted on the external surface of a center pipe, a pressure transmitting hole is formed in the center pipe, a sealing pressure transmitting mechanism is mounted annularly formed by the sealing part and a center hole, and a desealing mechanism is mounted at the lower part of the sealing part. The anchoring part and the sealing part are connected through the same center pipe, thereby realizing both the anchoring and the sealing functions of the packer, and as a result, not only the anchoring function for preventing the injection string from wriggling is realized, but also the packer setting function for separating injection is realized. When the string is blocked in the repeated operation, all the tools can be drawn out at the same time during fishing, and therefore the operation time is shortened. The utility model is reliable to work and effectively solves the problem of fine water injection in small clamping distance of the injection well.