The invention belongs to the technical field of injection molding processing. The invention provides an injection mold for cushioning L-shaped pieces, which includes a front mold structure and a rear mold structure. The front mold structure includes an upper mold plate, a feeding assembly, a thimble bottom plate, a thimble panel, an upper mold core, an upper mold core, and an insert And the inclined top assembly, the inclined top assembly includes the inclined top head, the inclined top rod, the inclined top foot, the inclined top base, the pin and the fixing assembly, the upper end of the inclined top base is connected with the thimble panel, and the insert and the inclined top form an L-shaped cavity , the L-shaped cavity communicates with the product cavity. During processing, the glue is fed by the feeding component, and it impacts the L-shaped cavity first, so that the glue flow does not rush against the product cavity, which plays a buffer role. When the rubber flows into the product cavity, the cross-sectional area of the L-shaped cavity is larger than that of the input The glue inlet of the material component slows down the flow rate to ensure that there are no air marks, trapped air, jet lines and shrinkage depressions on the front appearance of the product; the L-shaped cavity is set in the middle of the product cavity, from the glue inlet to the periphery of the product The distance is relatively short to ensure the dimensional accuracy of the product.