The invention discloses a two-dimensional scanning micromirror of an electrostatic drive microelectromechanical system. The two-dimensional scanning micromirror mainly comprises a low-resistance silicon substrate located on the bottommost layer, fixed comb teeth, comb tooth leads, movable comb teeth, a two-dimensional scanning micromirror set, supporting beam sets and anchor positions, wherein the fixed comb teeth and the comb tooth leads are located on the middle layer, the movable comb teeth, the two-dimensional scanning micromirror set and the supporting beam sets are located on the topmost layer, and the anchor positions are located on both the middle layer and the topmost layer. Four L-shaped supporting beams are introduced in the X-axis direction as the mirror plane rotating shaft in the X-axis direction, so that the leads of the internal fixed comb teeth just pass through the center of the gap between every two adjacent L-shaped supporting beams. Due to the design, the device structure and the machining technology can be simplified, cost is reduced, the leads of the micromirror can be led more conveniently, and thus a large-scale micromirror array can be formed conveniently. The two-dimensional scanning micromirror is of vital significance in expanding the application fields of two-dimensional scanning micromirrors of electrostatic drive microelectromechanical systems.