Prema sadržaju rožnate vrste razlikujemo tvrdu i meku pšenicu. Horny rate meke pšenice je manji od 70%, sadržaj vlažnog glutena je oko 19% ~ 25%. Horny stopa tvrde pšenice je više od 70%, sadržaj vlažnog glutena je oko 29% ~ 35%. Tvrda pšenica je s većim udjelom rožnate tvari i mnogo kompaktnijim endospermom od meke pšenice, pa će dobiti veći pritisak istiskivanja i silu smicanja u obradi mljevenjem . Glavna razlika prosječnog antistresa uglavnom se ogleda u tome hoće li se endosperm lako pretvoriti u prah,to jest,roller clearance of reduction system is difference. The difference of shear force is mainly reflected on the different roller parameters of Break system. in head grinding stage. The power consumption of soft wheat to hard wheat is about 80% under same process parameters. Epidermis and endosperm of hard wheat and soft wheat are with different water absorption speed and capacity,so there will be different expansion after absorbing water , it is resulting in the separation situation between epidermis and endosperm of hard wheat and s oft wheat . It is easier to scrap hard wheat epidermis , but its epidermis is fragile because high brittleness.