The invention relates to an integrated packer in the technical field of oil exploitation. The integrated packer comprises an upper contact, an upper central tube, a valve body, a lower central tube and a lower contact, wherein a positioning righting mechanism is arranged on the periphery of the upper central tube below the upper contact, an expansion rubber sleeve is arranged on the periphery annulus of the lower central tube; the valve body is provided with a center channel and an eccentric channel, a plug stick is arranged in the eccentric channel, and a ball seat is arranged in the eccentric channel on the lower end of the plug stick; a valve ball, a valve cover and a first spring are arranged on the lower portion of the ball seat in sequence, the valve cover abuts against the upper end of the first spring, and a stream guidance sleeve abuts against the lower end of the first spring; the stream guidance sleeve is used for communicating the upper side of the eccentric channel and the annulus between the lower side of the expansion rubber sleeve and the lower central tube; a piston portion is arranged on the upper portion of the plug stick, the eccentric channel on the lower side of the piston portion is communicated with the center channel through a radial channel, the upper side of the piston portion is communicated with a well casing, and a mechanical releasing mechanism is arranged on the upper end of the plug stick. The integrated packer has many functions of positioning, righting, hydraulic pressing and mechanical releasing, is high in flowback-preventing pressure, and capable of prolonging the service life of the separate-layer string.