The invention discloses a casting mold for a vortex-induced vibration suppression device. The casting mold comprises an underframe, a rotating tilt stand, a female die, a female die support, a male die, a male die support, a rotating mechanism, a pressing mechanism, a hydraulic station, a heating device and the like; the female die consists of a semicircular female mold with a spiral groove, and a built-in heating coil; the male die consists of a semicircular male mold; the rotating mechanism and the pressing mechanism are hydraulic power mechanisms to control the rotating tilt stand and the male mold to oscillate; the mold comprises two sets to realize the casting of two parts of the vortex-induced vibration suppression device; and finally the two half parts are assembled into a molded product of the vortex-induced vibration suppression device.