The invention discloses a drying and sterilizing device based on improving the diversion speed, which comprises a casing, an air inlet and an air outlet are arranged on the casing, a conveying mechanism is arranged under the inside of the casing, and a heating device is arranged inside the casing above the air inlet , the inside of the shell is provided with an air gathering tube, the side wall of the air gathering tube is provided with an air inlet that cooperates with the heating device, the shell is provided with a heating laminar flow fan that is matched with the air gathering tube, and the lower end of the air gathering tube is set There is a second filter, the air outlet end of the second filter is connected with a wind gathering hood, the air outlet end of the wind gathering hood is matched with the conveying mechanism, the heating device is detachably arranged, and the air outlet of the wind gathering hood The air end is provided with a diffuser mechanism; the air collector is provided with a deflector. The invention solves the problem that the heating device of the existing dry sterilizer is inconvenient to clean and maintain, and easily leads to poor sterilization effect, and at the same time, the invention can effectively increase the introduction speed of the dry hot air flow.