The invention discloses an adjusting device of computer display screens for software research and development. The adjusting device comprises a base plate, wherein a first column body is fixedly installed at the top of the base plate, a second column body is installed on the first column body in a sliding mode, a supporting plate is hinged to the top of the second column body, a supporting rod isarranged at the top of the supporting plate, a sucking disc is fixedly installed on one side of the supporting rod, and an air pipe is connected to the sucking disc; and an air bag is fixedly connected to one end of the air pipe, the air bag is located at the top of the supporting plate, an arc-shaped rod is welded at the bottom of the supporting plate, limiting holes are formed in the arc-shapedrod, a placing cavity is formed in the second column body, a limiting rod is installed on the second column body in a sliding mode, one end of the limiting rod penetrates through the placing cavity tobe in sliding connection with limiting holes, a spring sleeves the limiting rod, and a stop block is fixedly installed on the limiting rod. The adjusting device is suitable for fixing the display screens with different sizes, height adjustment and angle adjustment are integrated, an adjusting range is wide, various watching requirements are met, an adjusting mechanism is stable and firm, use is convenient, and popularization is easy.