Pre-perforated plate structure in manufacturing of omnidirectional geogrid

The invention relates to the processing for a high polymer product, in particular to a pre-perforated plate structure in the manufacturing of an omnidirectional geogrid. The pre-perforated plate structure comprises a plate body which is provided with a plurality of regularly and orderly arranged pre-perforated holes; and the arrangement form of the pre-perforated holes is that the transverse central distances of the pre-perforated holes are equal, every two pre-perforated holes are in one group, each group of the pre-perforated holes are staggered up and down to form a combined line, every two pairs of combined lines are arranged longitudinally and symmetrically, the perforated hole diameter D is 3-10mm, the transverse central distance a is 1.5-3D, the staggered distance c of each row is O-D, and the longitudinal central distance b is a-4a. For the geogrid formed by the longitudinal and transverse stretching, the longitudinal strength is nearly the same as the transverse strength, and the stress is uniform; m