The invention discloses a speed changing cutter device for an absorbable object. The speed changing cutter device comprises a rotary cutter assembly, a speed changing assembly and a drive motor. The rotary cutter assembly comprises an anvil roller and a cutter roller. The speed changing assembly comprises at least two gear pairs. Each gear pair comprises at least one non-circular gear pair matched with a preset speed changing curve, and any one of the gear pairs on the speed changing assembly is correspondingly and detachably connected with the anvil roller and the cutter roller. Production of a plurality of series of products can be achieved by using one set of cutter device, only the position of a gear case needs to be adjusted during debugging, the equipment cost is saved, and the code changing time of the products is shortened. According to the speed changing cutter device, the confronted common fault that in the current industry, equipment code changing difficulty is large, the period is long and the cost is high is thoroughly changed, and the actual production requirement is met.