The　grey　system　theory　GM(1,　1)　is　introduced.　A　grey　prediction　model　of　drying　shrinkage　of　crumb　rubber　concrete(CRC)　is　established　based　on　GM(1,　1).　The　drying　shrinkage　value　and　trend　of　different　CRC　is　predicted　by　the　grey　prediction　model,　and　at　the　same　time,　was　measured　in　the　lab.　The　results　show　that　the　prediction　values　well　accord　with　the　measured　values.