Special milling machine for rear cover of agricultural machinery cylinder

The invention discloses a special milling machine for a rear cover of an agricultural machinery cylinder. The special milling machine comprises a rack, a workpiece table and a first linear reciprocating motion mechanism for controlling the workpiece table to horizontally slide left and right are arranged on the rack, a milling power head is arranged on at least one side of the workpiece table, themilling power head comprises a milling cutter, wherein the rotating axis of the milling cutter horizontally extends front and back, and a mounting hole allowing a workpiece to be embedded is formed in the workpiece table; and a clamping block is horizontally and slidably arranged in the mounting hole, an adjusting block abuts against one end of the clamping block, a second linear reciprocating motion mechanism for controlling the adjusting block to vertically move up and down is arranged on the workpiece table, the clamping block is provided with a driven slope surface attached to the adjusting block, the adjusting b