An anti-deformation damper manufacturing method comprises an impregnation step, a drying step, a cutting step, a hot pressing and shaping step and a trimming step. Mainly, multiple cutting grooves and multiple symmetric punching devices in the cutting step are utilized, and a cloth material is enabled to provide distortion allowance and contraction allowance in the hot pressing and shaping step, so that a damper formation block of the cloth material is enabled to uniformly bear external force pressing and heated shaping by a hot pressing die and is prevented from generating uneven deformation in the hot pressing and shaping step. At the same time, conditions that the damper generates uneven deformation, the waste material is generated and the damper is broken due to hot pressing in the damper manufacturing process can be effectively avoided.