Material pressing device used before kelp cutting

The utility model provides a pressing device used before kelp cutting, which comprises an unpowered roller, and the unpowered roller is driven by a conveying device to roll close to the surface of the conveying device. The unpowered rollers are mounted on the conveying device through two racks, and the two racks are mounted on an outer shell of the conveying device left and right; a connecting shaft is arranged on the rack, a shaft hole is formed in the axis position of the unpowered roller, a bearing is installed in the shaft hole, the connecting shaft is installed in the shaft hole through the bearing, and the unpowered roller rotates relative to the connecting shaft through the bearing. The material pressing device used before cutting comprises the unpowered idler wheel, when kelp materials move along with a conveying device and pass through the unpowered idler wheel, friction force is generated between the kelp materials and the unpowered idler wheel to drive the unpowered idler wheel to rotate, then the