In　rock　mass　engineering,　stress　balance　changes　often　cause　the　relative　slip　of　fractures　along　a　wall　surface,　impacting　the　seepage　behavior　of　fluid　in　the　fractures.　Using　computer　tomography　(CT)　scanning,　spatial　models　of　fractures　with　dislocations　ranging　from　0　to　10　mm　were　created　to　explore　the　relationship　between　changes　in　fracture　dislocation　and　changes　in　fluid　flow　behavior,　respectively.　The　spatial　fractal　dimension　of　cavity　distribution　within　the　fractures　was　calculated　using　a　thin-plate　filling　approach　to　characterize　the　complexity　of　the　fracture　cavity　distribution.　The　fluid　flow　within　the　dislocation　fractures　was　then　simulated　using　COMSOL,　and　the　effect　of　cavity　alterations　in　the　form　of　dislocation　on　the　fluid　seepage　behavior　was　analyzed　using　the　spatial　fractal.　The　results　show　that　the　values　of　mechanical　aperture　after　dislocation　of　the　fracture　obtained　by　a　CT　test　are　normally　distributed,　the　distribution　range　of　mechanical　aperture　gradually　widens　with　an　increase　in　the　dislocation　distance,　and　the　average　mechanical　aperture　increases　on　a　logarithmic　curve.　The　relative　spatial　fractal　dimension　decreases　gradually　with　an　increase　in　dislocation　distance,　and　the　interconnected　pathways　within　the　fracture　decrease;　in　addition,　it　is　observed　that　the　change　in　the　relative　spatial　fractal　dimension　is　closely　correlated　with　the　change　in　the　mean　mechanical　aperture.　Numerical　simulations　of　dislocation　fracture　seepage　found　that　the　permeability　increases　nonlinearly　with　increasing　dislocation　distance.　When　the　dislocation　distance　reaches　5　mm,　nonlinear　behaviors　such　as　eddy　currents　occur,　and　the　influence　range　of　eddy　currents　gradually　expands　with　the　increase　in　dislocation　distance　under　the　influence　of　the　boundary.　Moreover,　the　inertia　coefficient　B　in　the　Forchheimer　equation　and　the　critical　hydraulic　gradient　Jc,　which　can　describe　the　nonlinear　seepage　characteristics,　show　a　power　function　decreasing　trend　with　increasing　dislocation　distance,　and　the　fluid　in　the　fracture　is　more　likely　to　produce　nonlinear　flow.