The invention discloses a mobile dual-robot mirroring processing system for weak-rigidity wallboard processing. The mobile dual-robot mirroring processing system comprises a positioning and navigationsystem, a driving milling robot, a driven supporting robot and working tables. Weak-rigidity wallboards are arranged on the working tables. The driving milling robot and the driven supporting robot are arranged in a mirroring mode relative to the weak-rigidity wallboards. The positioning and navigation system is used for guiding omni-directional mobile platforms of the driving milling robot and the driven supporting robot to processing positions. The driving milling robot is used for lifting a milling terminal end effector to implement milling and drilling on the to-be-processed surface of the corresponding weak-rigidity wallboard to be processed according to the obtained high-precision position relation of the driving milling robot relative to the weak-rigidity wallboard to be processed.The driven supporting robot is used for conducting auxiliary supporting on the weak-rigidity wallboard to be processed. Through the mobile dual-robot mirroring processing system, there is no need tocustomize special tooling equipment. The supporting position is more flexible, and the automatic processing level of the overall wallboards and other weak-rigidity thin-wall structures can be improvedremarkably.