The invention provides a linear concrete pole straightener used for straightening an oblique concrete pole. The linear concrete pole straightener comprises a truck body, a fixing mechanism and a clamping and straightening mechanism, wherein the bottom of the truck body is provided with support legs; the bottoms of the support legs are provided with traveling wheels; the rear side of the truck body is provided with the fixing mechanism; the fixing mechanism comprises a fixed oil cylinder which is obliquely arranged and fixed on the bottom of the truck body; a piston rod of the fixed oil cylinder is fixedly provided with a fixed disk; the bottom of the fixed disk is provided with a felting needle; the front side of the truck body is provided with the clamping and straightening mechanism; the clamping and straightening mechanism mainly comprises a sliding block, a straightening oil cylinder, clamping oil cylinders and clamping plates; the top of the truck body is slidably provided with the sliding block; the straightening oil cylinder is arranged between the sliding block and the truck body; the truck body is articulated with one pair of arc-shaped clamping plates; the clamping oil cylinders are arranged between the sliding block and the clamping plates. The linear concrete pole straightener provided by the invention is capable of effectively straightening power poles and preventing power outage caused by power pole inclination.