The invention discloses an asymmetric DPF die and a manufacturing method thereof. The asymmetric DPF die comprises an overall die plate, two or more evenly-distributed feeding holes are formed in the back face of the overall die plate, two or more evenly-distributed discharging grooves are formed in the front face of the overall die plate, and the discharging grooves communicate with the corresponding feeding holes, wherein the two or more discharging grooves are composed of two types of tooth columns with different sizes. According to the asymmetric DPF die, groove face tooth columns are designed through the round corners, sharp corner interference is avoided, and the end face
cracking defect during product firing can be effectively overcome; according to the asymmetric DPF die, split type XY electrodes are adopted for
machining the groove face, the number of
electrode machining devices is large, the selection range of
electrode materials is wide, cost is low,
machining is more convenient, efficiency is higher, the machining period is short, and machining cost is lower; and the advantages that a narrow slit is not prone to deforming during machining is achieved, the roughness of the inner wall of the groove can reach Ra1.0, so that the forming
extrusion requirement is met, and good practicability is achieved.