The invention provides a drafting apparatus for short fiber compound and a spinning device for the drafting apparatus. The drafting apparatus (1) comprises at least two drivable lower rolls (4, 6), a plurality of upper rolls (5, 7, 13) capable of being compacted to the lower rolls, and a fixing member (17) used for fixing at least one upper rolls (7; 16) mentioned above, wherein the upper rolls (7; 13) and the fixing member (17) can jointly form a spinning unit (18); the upper rolls (7; 13) comprise a shaft body (15; 16) fixed upon the fixing member (17) and at least one sleeve (19) capable of being rotatably installed upon the shaft body (15; 16); the sleeve comprises a shield (20) arranged by keeping a distance with the fixing member (17); the external circumference of the shaft body (15; 16) between the shield (20) and the fixing member (17) is covered by an dust cap (22); and the dust cap preferably rotates around the shaft body (15; 16).