This invention is to a corn stalk material and its preparation method and apparatus. The corn stalk material is the peel of the corn stalk which is one or more materials selected from the group consisting of a silk-shaped peel of the corn stalk and a strip- shaped peel of the corn stalk with residual pulp of the corn stalk. The method for the corn stalk material includes the following steps: 1) using an agricultural harvester to harvest the corn stalk； 2) when harvesting, the corn stalk being separated, and obtaining a pulp, a leaf and a peel of the corn stalk respectively； 3) collecting peel of the corn stalk when a moisture content is 15-45%； The collected pulp and leaf of the corn stalk are as feed, or fermented to produce lactic acid or alcohol.
