The invention provides a seabuckthorn pulping and separating one-piece device, characterized in that: a tubular screen is sleeved on the inner layer of the tubular separation cage and the separation cage and the screen are of cone barrel which broadens from the feed port to the slag tap along the main axle direction and collars are arranged in equal interval on the main axle in the screen and three pulping plates are mounted on each collar in equal division and the pulping plates of the adjacent collars stagger by a certain angle Alpha, the angle Alpha is the degree of number equal-divided round-angle of the collar and the mounting included angle of each pulping plate and the main axle is Beta and the included angle Beta is 15-20 degree. The space distance between the upper end surface ofthe pulping plate and the screen is 2-3mm. The device increases the production efficiency, pulping rate and juice quality.