The invention discloses a self-spraying type fog pile for construction site. The self-spraying type fog pile for the construction site comprises a bottom pile, a spraying pile, a connecting pile and a deceleration strip, wherein the upper surface of the bottom pile is fixedly connected with the lower surface of the connecting pile, the upper surface of the connecting pile is fixedly connected with the lower surface of the spraying pile, the surface of the spraying pile is fixedly connected with a water guide support rod, and the surface of the water guide support rod is inclined, the end, far away from the spraying pile, of the water guide support rod is fixedly connected with a spray forming ring, and relates to the field of fog piles. According to the self-spraying type fog pile for the construction site, the bottom pile, the spraying pile and the connecting pile can further play a role in limiting vehicle passing, the size of the fog pile is designed according to the size of the vehicle, and the speed of the vehicle can be reduced by combining the deceleration strip, and the dust which is rolled up by the vehicle is reduced while the safety of the construction site is improved, so that the problems that most of the spraying ranges of common spraying piles are wide, no pertinency exists, air dust is removed mainly in a large range, the spraying time is not easy to control, and the water resource consumption is large are solved.