The utility model discloses an adiabatic calorimetry testing device for the thermophysical parameter of bituminous mixture. The testing device comprises a Dewar flask, and a vacuum chamber arranged in the cavity of the Dewar flask, wherein the vacuum chamber is internally provided with an adiabatic chamber consisting of an internal adiabatic screen and an external adiabatic screen, and the adiabatic chamber is connected into the vacuum chamber by an upper nylon fishing line; and the adiabatic chamber is internally connected with a test sample sheathed with a calorimeter by a lower nylon fishing line, a heating wire is wound on the outer surface of the test sample and connected with a blade terminal arranged above the vacuum chamber through a lead, the blade terminal is connected with a conductor to extend out of the flask neck and then connected with an output lead, and the output lead is connected with an electricity measurement system, a temperature measurement system and a temperature control system of a testing system respectively. According to the device, the problems in the prior art can be solved, the adiabatic calorimetry testing device is used for testing the thermophysical parameter of the bituminous mixture, the tested data is accurate and the device is convenient.