The invention belongs to the technical field of crop straw treatment, and particularly relates to a recycling method for crop straw. A baler in the method comprises a base, a support frame, a belt, aconveying module and a baling module, wherein the baling module comprises cushion blocks, a wedge magnet, swinging blocks, a connecting block, a steel wire rope, a NO.1 reel and a NO.2 reel. Two groups of swinging blocks are arranged at the upper end of the wedge magnet, two ends of the swinging blocks are connected end to end, the NO.2 reel is arranged below the NO.1 reel and is in meshing transmission with the NO.1 reel through a gear, wire ropes are arranged in threading holes in the swinging blocks, straw on the swinging blocks is rolled to be cylindrical, and finally the straw is baled; the wedge magnet is arranged below the swing blocks, so that the steel wire ropes are gradually rolled up from two sides when pulling the swinging blocks to roll up, the straw on the swing blocks is prevented from centrally sliding to the middle of the swinging blocks when being rolled up, and the straw rolled to be cylindrical is firmer.