The　design　of　similar　materials　is　one　of　the　key　links　to　ensure　the　matching　of　the　physic-mechanical　properties　between　the　prototype　and　the　test　specimens.　Based　on　the　prototype　of　the　Xianglu　mountain　tunnel　of　the　water　diversion　project　in　the　central　Yunnan　province,　China,　the　scaling　relationship　of　the　physical　quantities　in　the　quasi-static　scaled　test　of　a　fault-crossing　tunnel　is　derived　in　this　study　according　to　the　similarity　theory　and　dimensional　analyses.　The　similar　materials　of　concrete　and　rock　mass　used　in　the　test　are　developed　with　barite　powder　and　sand　as　the　aggregates　and　with　gypsum　and　lime　as　the　cementing　material.　The　effects　of　each　component　on　the　physic-mechanical　properties　of　the　similar　materials　are　investigated　through　orthogonal　tests.　The　test　results　indicate　that　the　strength,　elasticity　modulus　and　density　of　the　similar　materials　can　be　significantly　changed　by　the　overall　content　of　the　high-strength　gypsum　and　water-gypsum　ratio.　Small　variation　of　the　strength　of　the　similar　material　is　found　when　the　sand-gypsum　ratio　is　between　0.8　and　1.2,　but　the　strength　significantly　decreases　when　the　sand-gypsum　ratio　is　between　3　and　12.　The　elastoplastic　performance　and　the　brittle　failure　mode　of　Grade　C30　concrete　can　be　well　simulated　by　the　similar　material　made　of　high　strength　gypsum,　low　strength　gypsum,　barite　powder　and　sand.　The　tensile　splitting　and　the　diagonal　shear　failure　modes　of　rock　mass　of　Grade　IV　and　V　can　be　well　simulated　by　the　proposed　similar　material　made　of　high　strength　gypsum,　lime　and　sand.　The　development　process　and　ratios　of　similar　materials　can　provide　important　reference　for　model　test　and　numerical　simulation.　Copyright　©2022　Engineering　Mechanics.　All　rights　reserved.