Based　on　fracture　mechanics　theory,FEM　was　used　to　analyze　the　tearing　characteristics　of　two-dimensional　rubber　sheet　with　initial　straight　edge　crack　under　uniaxial　tension.The　random　sequence　adsorption(RSA)algorithm　was　used　to　generate　the　random　distribution　model　in　ABAQUS.The　influence　of　mesh　size　and　integral　path　on　J　integral　was　studied,and　the　J　integral　in　different　spreading　directions　was　calculated.The　relation　of　J　integral(the　propagation　direction　is　parallel　to　the　initial　crack　direction)with　short　fiber　content,length,diameter　and　fiber　orientation　angle　was　analyzed.The　results　show　that　the　mesh　size　and　the　integral　path　have　an　influence　on　the　J　integral.The　J　integral　increases　as　the　tensile　load　increases.Under　the　same　initial　straight　edge　crack(a0=6.25　mm),the　tear　resistance　of　short　fiber　reinforced　rubber　composite　increased　with　the　increase　of　short　fiber　content,length　and　diameter,but　decreased　with　the　increase　of　short　fiber　orientation　angle.The　tearing　resistance　of　short　fibers　with　random　orientation　in　small　angle　range　is　better　than　that　in　large　angle　range.　©　2023　Xi＇an　Jiaotong　University.　All　rights　reserved.