The　effect　of　holes　on　initial　electrical　resistivity　and　piezoresistive　coefficients　was　investigated　by　taking　constantan　as　an　example.　The　relationship　between　average　stresses　and　average　electrical　resistivity　of　an　inhomogeneous　composites　with　holes　was　replaced　by　that　of　a　homogeneous　material.　The　homogenization　method　was　used　to　calculate　initial　electrical　resistivity　and　piezoresistive　coefficients　of　a　square　plate　with　holes.　The　conclusions　can　be　summarized　as　follows.　Initial　electrical　resistivity　and　piezoresistive　coefficients　AKπ-11,　AKπ-22　of　constantan　material　increase　with　the　increase　of　volume　fraction　of　holes,　and　piezoresistive　coefficients　AKπ-12,　AKπ-21　decrease.　Effect　of　triangle　holes　on　initial　electrical　resistivity　and　piezoresistive　coefficients　of　constantan　material　is　the　most　obvious.　©　2018,　Editorial　Office　of　Acta　Materiae　Compositae　Sinica.　All　right　reserved.