The invention discloses a control force adjusting device and belongs to the technical field of control systems. The control force adjusting device comprises a friction assembly, a torsion transfer assembly, a gradient adjusting assembly and a mounting support. The mounting support is composed of a bottom plate and fixing mounting plates arranged on the left side and the right side. The torsion transfer assembly is provided with a torsion shaft, a rocker, a left axial rotary supporting element, a right axial rotary supporting element and a friction plate, wherein the rocker is fixed to the middle portion of the torsion shaft, the left axial rotary supporting element is arranged on the left side of the rocker, the right axial rotary supporting element is arranged on the right side of the rocker, and the left axial rotary supporting element and the right axial rotary supporting element are fixed to the fixing mounting plates. The two ends of the torsion shaft penetrate through the mounting support to be connected with the friction assembly and the gradient adjusting assembly separately. The friction assembly can adjust the clamping force of one end of the torsion shaft. The gradient adjusting assembly can adjust the gradient force of the torsion shaft by adjusting the mounting position of a torsion spring of the gradient adjusting assembly. Control force enters the adjusting device via the input end of the rocker, and is output from the output end of the rocker after being adjusted.