The utility model discloses a shaping bed die of signal wheel, including mold core and die sleeve, the mold core is installed and form the integral type structure in the die sleeve, just the mold coresets up with the die sleeve is concentric the center of mold core is provided with the die cavity, this die cavity be formed with first protruding portion, second protruding portion, the third protruding portion and fourth protruding portion that suits with the signal wheel all around, the width of first protruding portion and second protruding portion is less than third protruding portion and fourth protruding portion, wherein contained angle alpha, the beta on true edge and the both sides limit of third protruding portion of first protruding portion be 130 5 respectively /, 162 5 /, contained angle gamma, the delta on the true edge of first protruding portion and the both sides limit of fourth protruding portion be 72 5 respectively /, 140 5 /. It is showing the effect: with two each inside translation constant angle degree of tooth limit that the width is great among the female mould cavity for two great breadth of tooth degree of product of working it out reduce in right amount, the balanced resilience value of four teeth, and then guarantee that product angular discrepancy is little, improved product quality effectively.