Most　of　the　current　4D　printing　technologies　have　the　following　defects:　1)　the　deformation　shape　is　simple;　2)　the　deforming　precision　is　poor;　3)　the　deformation　process　is　always　uncontinuous.　In　this　study,　a　new　4D　printing　process　based　on　the　composites　with　embedded　continuous　fibers　is　proposed.　In　this　process,　a　bilayer　structure　consisting　of　the　top　layer　of　continuous　fibers　and　the　bottom　layer　with　resin　is　3D　printed.　Due　to　the　different　thermal　expansion　coefficient　and　elastic　modulus　of　the　top　and　bottom　layers,　the　structure　will　produce　bending　deformation　when　the　temperature　changes.　It　is　found　that　the　curvature　value　and　the　curvature　direction　of　the　composite　structure　can　be　precisely　controlled　by　the　angle　of　the　intersecting　fibers.　The　influence　of　fiber　trajectory　on　curvature　is　studied,　and　then,　the　controllable　deformation　of　any　developable　surface　is　achieved.　©　Solid　Freeform　Fabrication　2018:　Proceedings　of　the　29th　Annual　International　Solid　Freeform　Fabrication　Symposium　-　An　Additive　Manufacturing　Conference,　SFF　2018.　All　Rights　Reserved.