The invention belongs to the field of ventilation equipment, and particularly relates to an accurate local ventilation device used for reducing the temperature of the neck of a dairy cow, wherein the accurate local ventilation device is used for relieving heat stress of the dairy cow in an open-type cowshed in summer. The ventilation device comprises a cold air unit (1), a ventilation pipeline (4), an air feeding port (9), a first supporting frame (10), a neck cangue (11) and a second supporting frame (17). The ventilation device is used in the eating stage of the dairy cow in the open-type cowshed in summer and used for the neck portion of the dairy cow, and the accurate local ventilation device is installed on the upper portion of the neck cangue to relieve heat stress of the dairy cow.