The invention discloses a straw conveying mechanism of a sand fixation vehicle. The straw conveying mechanism of the sand fixation vehicle comprises a guiding device and a conveying device. The guiding device comprises a straw conveying plate, a diverting wheel and a pressing wheel. The conveying device comprises a conveying chain and a conveying wheel. The guiding device conveys reed stems to the straw conveying mechanism through the straw conveying plate under the action of the diverting wheel, and conveys the reed stems to the conveying chain through the pressing wheel. Meanwhile, the pressing wheel can be adjusted by a hydraulic cylinder to achieve up-down motion in space. When a blocking phenomenon occurs in the process of conveying the reed stems to the conveying chain, a certain angle is formed by the conveying chain and the horizontal plane through a guiding mechanism, sawteeth on the chain can shift the reed stems, the blocking phenomenon in the conveying process is avoided effectively, and finally the reed stems are conveyed to the ground through the conveying wheel.