The utility model relates to the technical field of oil extraction equipment, in particular to a well packer, which integrates blowout control, polish rod righting and packing rapid change to be an integrated body, and comprises a packing cylinder, righting mechanisms and a blowout control mechanism, wherein four righting mechanisms are arranged and are distributed in the radial direction along a main cylinder, the working principle of the righting mechanisms is similar to a four-jaw chuck, can accurately adjust coaxiality of a well packer and a polish rod and positions, and prevents eccentric wear imaging, prevents untight sealing, packing loss even polish rod fracture caused by eccentric wear. The blowout control mechanism can prevent crude oil from leaking after the polish rod breaks, and protects the environment from being polluted. Furthermore, when needing to change a packing, the packing is simply and rapidly changed through the design of the packing cylinder, thereby having small influence to production.