The utility model discloses a bituminous mixture vacuum plastic envelope appearance, including support, vacuum system, heating sealing system, signal acquisition and control system and gas way pipeline and valve control system, signal acquisition and control system pass through gas way pipeline and valve control system is connected with vacuum system and heating sealing system respectively, signalacquisition and control system include intelligent microcomputer processor, the vacuum pilot compound solenoid valve that the vacuum cavity passes through gas way pipeline and valve control system links to each other with vacuum pump and atmosphere respectively. The utility model discloses a vacuum pilot compound solenoid valve combines together with intelligent microcomputer processor, in the experiment on large -gap porous asphalt road surface, and the air in the surperficial space and the internally piloting space of the bituminous mixture test piece of thoroughly discharging, this instrument can effectively avoid the plastic envelope bag to puncture in the process of the test simultaneously, improves plastic envelope efficiency, the use is convenient and possess hommization, excellentin use effect, in addition, its structural design is reasonable, and low in manufacturing cost is honest and clean, and application prospect is extensive.