A pepper milling device comprises a transmission mechanism driven by a hand grip arranged in an upper casing body and a milling device arranged on the bottom base of a lower casing body, the transmission mechanism comprises a fixed sleeve with an axial slot hole, a connection sleeve sliding movable along the axial direction in the fixed sleeve, and a moveable connection sleeve in the connection sleeve. The axial saw blade on the connection sleeve outer wall meshes with the saw blade on the hand grip. A screw shade groove and a convex rib are arranged on the inner wall of the moveable connection sleeve and a revolving shaft positioned in the moveable connection sleeve, and matched mutually, the lower part of revolving shaft is connected with a central spindle on the lower casing body, the central spindle is inserted in and movably matched with the central hole of supporting rack, a moveable mill of milling device is sleeved and arranged on the central spindle, the mill base inner surface and the moveable mill peripheral surface take on conical surfaces matching mutually; a spring is arranged between the upper ends of the movable mill and the supporting rack, a button which is used to adjust the gap between the movable mill and the mill base is arranged at the bottom part of movable mill. The utility model is simple in structure, pepper granular can be milled into powder only by pressing the hand grip with finger when in operation, and the pepper powder can be scattered into food.