In　order　to　investigate　the　effect　of　crack　on　tensile　property　of　conductive　rubber　films(CRFs)　under　uniaxial　tension　load　condition,　carbon　fiber-filled　silicon　rubber　films　were　fabricated　by　spraying　process,　and　tensile　properties　including　tensile　strength,　elongation　at　break　and　tearing　energy　were　tested　to　evaluate　the　crack　propagation　resistance　of　CRFs　with　precracks　in　different　shape,　size　and　directions.　Fractograph　was　conducted　to　analyze　the　effect　of　carbon　fibers　on　crack　propagation　in　CRFs.　Results　show　that　the　tensile　strength　and　elongation　at　break　of　precracked　CRFs　decrease　approximately　linearly　with　the　increasing　length　of　surface　crack　in　mode　I,　while　the　tearing　energy　decreases　by　stages.　Meanwhile,　crack　shape　exhibits　more　important　influence　on　the　tensile　properties　than　crack　location　does　as　well　as　that　greater　adverse　influence　on　tensile　properties　of　CRFs　comes　from　centered　cracks　seems　greater　compared　to　that　from　surface　crack.　With　the　increase　of　angle　between　crack　plane　and　stress　in　centered-crack　mode　I,　tensile　properties　of　precracked　CRFs　decrease　till　the　lowest　resistance　appears　when　the　crack　plane　is　perpendicular　to　the　stress.　Secondary　cracks　appear　in　crack　propagation,　which　become　as　obstacle　to　the　crack　propagation.　Carbon　fibers　play　the　same　hindrance　role　by　means　of　reinforcing　the　CRFs　as　well　as　changing　the　propagation　direction　of　the　crack.　©　2019,　Editorial　Board　of　Polymer　Materials　Science　&　Engineering.　All　right　reserved.