The utility model discloses an I-shaped mold with positioning and punching functions for a plastic-wood profile. The mold comprises an I-shaped mold body, a threaded fastener and a linear sliding table, two sets of clamping plates are symmetrically arranged at the front end and the rear end of the upper portion of the I-shaped mold body. Each set of clamping plates are located on the two symmetrical sides of the I-shaped mold body correspondingly. threaded fasteners are mounted at the bottom of the I-shaped mold body and on the clamping plate; a side clamping plate is mounted at the inner endof a threaded fastener mounted on the clamping plate; a supporting plate is mounted at the top end of a threaded fastener mounted on the I-shaped mold body; hydraulic telescopic rods are installed atthe upper ends of the clamping plates, a linear sliding table is installed on the two hydraulic telescopic rods at the upper end of each set of clamping plates, and each linear sliding table comprisesan L-shaped plate, a ball screw, a sliding rod, a lead screw motor, a lead screw nut, a nut fixing base and a sliding base. The fixing device is good in fixing effect, accurate in drilling positioning, convenient to control the drilling distance and easy to operate.