The invention discloses a multi-stage grading processing device for tea leaves. The multi-stage grading processing device for tea leaves comprises the following components which are orderly arranged: a spreading device for spreading picked tea leaves, an enzyme-deactivating device for performing enzyme-deactivating treatment on the tea leaves after spreading treatment, and a rolling device for rolling the tea leaves after the enzyme-deactivating treatment; the rolling device comprises a plate body, a net plate installed on the plate body and a filling plate detachably installed under the net plate; an inner cavity groove is arranged on the plate body; an installation groove for installing the net plate is arranged on a side wall of the inner cavity groove; the inner cavity groove is separated into an upper plate layer and a lower plate layer which are distributed up and down by the net plate; a gap interconnected to the lower plate layer is arranged on a side wall of the plate body; the filling plate enters the lower plate layer by sliding through the gap, so that the lower plate layer is filled by the filling plate; and multiple rectangular net holes which are vertically arranged in uniform intervals are arranged on the net plate.