Aiming at the problem of high impurity content of Fritillaria harvester, the ultimate extrusion load of Fritillaria under different types, moisture content and different positions was obtained by block test. The results show that the types of Fritillaria, the position and moisture content have significant effects on the ultimate extrusion load force of Fritillaria; the relationship between the ultimate extrusion load force of Fritillaria of four types is Dabei,Dapingtou, Dadouzi, Taobei. The relationship between the ultimate extrusion loading force of three positions is significant. The crack image analysis of Fritillaria showed that the relationship between the damage degree of Fritillaria and the ultimate extrusion load on the three moisture contents was 54% content ＞61% content ＞66% content.The relationship between the damage degree of Fritillaria and that of Fritillaria was forward＞side＞vertical. The research results can provide reference for the development of secondary separation device for Fritillaria harvester and the reduction of impurity content.