The utility model discloses a mining dump truck advances air duct device, the whole air duct device of advancing are Y type box structure, and the top -down sectional area diminishes gradually, mainly by down apron, right side board, upper cover plate, left side board and go up the shrouding welding and form, three openings department correspond weld there is flange no. 1, flange no. 2, flange no. 3, left and right curb plate is installed respectively on, and is used for the wind channel support be connected with other hot blast blowpipe apparatus. The utility model discloses a design of Y type box structure, the design is succinct, and the transition is reasonable, and the top -down sectional area diminishes gradually, has reduced the air inlet resistance, has improved cooling efficiency, each kneck of air inlet duct is flange joint, has improved the assembly reliability.