Tattoo practice device and operation pen using the same

A tattoo practice device, comprising a coloring portion, a connecting portion, and a sleeve, wherein

• the coloring portion comprises one or more coloring rods;
• wherein when the one or more coloring rods comprise a plurality of coloring rods, the plurality of coloring rods are arranged in a dot matrix, each coloring rod is a lead core comprising a non-piercing distal end;
• one end of the connecting portion is connected to the coloring portion, the connecting portion is linked with the coloring portion, and the sleeve is sleeved on a periphery of the connecting portion;
• the connecting portion is connected to an external driving member, and the connecting portion is configured to move in a first direction along a central axis of the sleeve, so that the lead core is close to a drawing medium and color the drawing medium;
• and the connecting portion is configured to move in a second direction opposite to the first direction along the central axis of the sleeve, so that the lead core moves away from the drawing medium.