The invention provides an automatic delivery vehicle for automatically sensing and switching the delivery positions of roadblock heaps. The automatic delivery vehicle comprises a vehicle body in whichtwo sets of roadblock heaps are stored, the vehicle body is provided with a pushing system and an alternate switching system, the pushing system is used for pushing roadblocks and causes the roadblocks to vertically fall onto a road surface, the alternate switching system is used for causing the pushing system to alternately pushing and delivering the two sets of roadblock heaps stored in the vehicle body, the vehicle body comprises a mounting plate, the mounting plate is horizontally arranged and provided with delivery holes, the delivery holes have regular hexagon structures which match with a roadblock pedestal, any one of the maximum diagonal lines of the delivery holes is parallel with the axial direction of a front wheel axle, two sets of delivery holes are arranged, the distance direction between the two sets of delivery holes is parallel with the heading direction of the vehicle body, the two sets of delivery holes are respectively a delivery hole I close to the rear end of the vehicle body and a delivery hole II close to the heading end of the vehicle body, a set of roadblock heap stored in the vehicle body is placed in the delivery hole I, and the other set of roadblockheap is placed in the delivery hole II.