The invention discloses a rapier belt punching mold with a steady material strap. The rapier belt punching mold with the steady material strap comprises an upper mold set and a lower mold set, whereinthe upper mold set comprises an upper mold plate, a punch fixing plate, a punch and an unloading plate; the upper mold plate is connected to a mold handle, the punch fixing plate is mounted on the lower surface of the upper mold plate, the upper surface of the unloading plate is connected to the lower end of an unloading spring, the upper end of the unloading spring is fixed to the punch fixing plate, the punch penetrates through the unloading plate and the punch fixing plate and the top end of the punch is connected to the lower surface of the upper mold plate; the lower mold set comprises afemale mold and a lower mold plate; the female mold is mounted on the upper surface of the lower mold plate, the female mold and the lower mold plate are fixed through a positioning pin, a duct wherethe head of the punch passes through is formed in the female mold, a pilot pin penetrates through the unloading plate and the punch fixing plate, the top end of the pilot pin is connected to the lower surface of the upper mold plate, and the lower end of the pilot pin is inserted into the female mold. The invention provides the rapier belt punching mold with the steady material strap, wherein phenomena that fibers of the rapier belt cannot be punched and broken and are torn and the like in the punching process can be avoided and unstable punching caused by shaking when the material strap is punched is avoided.