The invention belongs to the technical field of injection molding, and provides an injection mold for buffering L-shaped sheets. The injection mold comprises a front mold structure and a rear mold structure, wherein the front mold structure comprises an upper mold plate, a feeding assembly, an ejector pin bottom plate, an ejector pin panel, an upper mold block, an upper mold core, an insert and aninclined top assembly; and the inclined top assembly comprises an inclined top head, an inclined top rod, an inclined top pin, an inclined top base, a pin and a fixing assembly, wherein the upper endof the inclined top base is connected to the ejector pin panel, the insert and the inclined top head form an L-shaped cavity, and the L-shaped cavity is in communication with a product cavity. Duringmachining, the feeding assembly is used for feeding glue, the L-shaped cavity is impacted firstly, so that the glue flow does not directly impact the product cavity, and the buffering effect can be realized; when the glue material flows into the product cavity, the sectional area of the L-shaped cavity is larger than that of a glue inlet of the feeding assembly, the flow rate is reduced, and theproblems that the appearance of the front surface of the product is free of bubbles, trapped gas, jet lines and shrinkage cavities are solved; and the L-shaped cavity is arranged in the middle of theproduct cavity, the distance from the glue inlet to the periphery of the product is shorter, and the product size precision is ensured.