The invention provides a test device for simulating the influence of automobile exhaust on pavement materials. The test device comprises a case body, an automobile exhaust inlet
pipe, an
exhaust pipe, a mould fixing device, a
temperature control device, a
gas composition measuring device and a
data processing device, wherein the case body comprises a first side surface, a second side surface, a third side surface, a fourth side surface, a bottom surface and an openable top surface in sequence; the automobile exhaust inlet
pipe is arranged on the second side surface and stuck into the case body; the
exhaust pipe is arranged on the fourth side surface and is higher than the automobile exhaust inlet
pipe in height; the mould fixing device is arranged at the bottom of the case body so as to fix a pavement material mould on the bottom surface of the case body; the
temperature control device is arranged in the case body so as to maintain and stabilize the temperature in the case body within 45 DEG C to 55 DEG C; the
gas composition measuring device comprises a plurality of sensors that are vertically arranged on the inner wall of the case body in a linear way to measure the contents of gases in the case body; and the
data processing device is electrically connected with the
gas composition measuring device and can receive data transmitted by the gas composition measuring device so as to analyze and display the data.