The invention discloses an intake temperature control device, belonging to the technical field of machine design. The intake temperature control device comprises an intake pipe, an engine, an exhaust pipe, a gas compressor, a turbine, a connecting pipe, a volume cavity, a moving body and a spring, wherein the moving body is arranged in the volume cavity and is in sealed contact with the inner wall surface of the volume cavity, two through tubes penetrate through the upper wall surface and the lower wall surface of the moving body, and both ends of the spring are respectively connected with the right wall surface of the moving body and the right wall surface of the volume cavity. When the engine is in a low-speed work condition, the moving body is moved leftwards in the volume cavity, a second connecting pipe is communicated with a fifth connecting pipe, the intake air is heated through the exhaust waste heat, and the cold startup performance of the engine is better; when the engine is in a high-speed work condition, the moving body is moved rightwards in the volume cavity, and the second connecting pipe and the fifth connecting pipe are separated. The intake temperature control device, provided by the invention, has the advantages of reasonable design and simple structure, and is suitable for an intake heating system of the engine provided with a turbocharger.