The invention discloses an inertia dust-collection healthy dehumidification type preserved product smoking device with a conveniently-detached draught fan. Fins are arranged inside and outside a wall body of a smoking room and are connected with a water storage tank through upper and lower communication pipe; a fuming pipeline of a fuming furnace penetrates through the wall body to be connected with a gas inlet pipe of a cyclone separator; the cyclone separator is connected with the draught fan through a pipeline and an inertia dust collection device; an air outlet of the draught fan is arranged in the wall body; the fuming pipeline of the fuming furnace is provided with a gate; a light movable door is arranged at the bottom of the cyclone separator; a heat radiator and a vibrator are arranged on the surface of the cyclone separator; and an impeller of the draught can be used for cleaning dust in time by utilizing a centrifugal force. The inertia dust-collection healthy dehumidification type preserved product smoking device not only can realize green and energy-saving type smoking, and more importantly, a detaching technology of the draught fan is greatly improved, so that pressure on the end face of a shaft shoulder of a screw rod by a screw cap part can be simply eliminated when the draught fan is detached; and the problem that the draught fan is assembled through a thread and is automatically locked continuously under the action of a load and is not easy to detach is effectively solved, so that the technology is particularly suitable for conveniently detaching after the large-size draught fan is locked through the thread.