The invention discloses a straw particle briquetting device. The straw particle briquetting device comprises a bottom plate, a pressing box, a limiting block, a left air cylinder, a left fixed plate,a right air cylinder, a pressing block, a right fixed plate, a feeding port, a spiral conveyor, a blowing pipe and an air cock. The left end face and the right end face of the pressing box are open, and the limiting block is arranged at the left end in the pressing box. The left air cylinder is horizontally mounted on the left side of the upper end face of the bottom plate. The left fixed plate isfixedly connected to the left side of the upper end face of a base. The tail end of a piston rod of the right air cylinder is fixedly connected with the right end face of the pressing block. The leftend of the pressing block stretches into an opening in the right side of the pressing box. The right fixed plate is fixedly connected to the upper end face of the base below the pressing block. The feeding port is vertically mounted on the right side of the upper end face of a box body. An outlet of the spiral conveyor is formed over the feeding port, and the end, towards the feeding port, of theblowing pipe is bent downwards to stretch into the feeding port. The air cock is fixedly connected to the tail end, stretching into the feeding port, of the blowing pipe. The straw particle briquetting device has the beneficial effects of being novel in structure and low in cost.