Through　experiment,　the　variation　of　the　exhaust　energy　of　the　vehicle　diesel　engine　is　studied,　a　set　of　vehicle　diesel　engine-organic　Rankine　cycle(ORC)combined　system　with　internal　heat　exchanger　(THE)　is　designed,　the　zeotropic　mixtures　R416A　is　used　as　the　working　fluids　for　the　ORC　system　with　THE,　by　theoretical　analysis　and　numerical　calculation,　the　variation　of　the　vehicle　diesel　engine-ORC　combined　system　with　THE　under　entire　operating　conditions　of　the　diesel　engine　is　studied,　the　calculation　results　show　that,　when　engine　is　operating　at　high　speed　and　high　torque,　the　performance　of　the　vehicle　diesel　engine-ORC　combined　system　with　THE　is　higher.