Abstract: To meet the experimental requirements for studying rock-breaking mechanisms, excavation performance, and cutter wear characteristics during the research and construction of full-face TBM, an innovative modular cutterhead design was proposed, and a scaled-down multifunctional TBM rock-breaking test platform was developed. The platform integrates disc cutter rotary rock-breaking, continuous cutterhead excavation, disc cutter wear testing, and tunnel face image reconstruction. The dimensions of the test platform are 1,180 mm × 960 mm × 1,600 mm, accommodating rock specimens up to 540 mm × 540 mm × 120 mm in size. The maximum thrust capacity is 200 kN, and the maximum torque capacity is 2,000 N?m. After construction of the test platform, a series of experiments were conducted by replacing the cutterhead cutting tools, including disc cutter rock-breaking tests, disc cutter group excavation tests, disc cutter wear tests, and tunnel face surrounding rock reconstruction tests. The results demonstrated desirable experimental outcomes and reliable test data, verifying the comprehensiveness and reliability of the test platform's functions.