The invention relates to the technical field of fiber processing, and discloses a plant fiber product surface filament repairing device which comprises a cylinder wall. Conveying belts are arranged onthe two sides of the cylinder wall. The conveying belt on the left side is located below the cylinder wall, and the conveying belt on the right side is located above the cylinder wall. A stop piece is installed on the conveying belt on the right side and has high elasticity. A gas cylinder is welded to the left side of the cylinder wall. A moving cavity is formed in the left side of the cylinderwall. A moving rod is slidingly connected into the moving cavity. A gas storage cavity is formed in the moving rod. According to the plant fiber product surface filament repairing device, by forming an exhaust cavity in the cylinder wall, when a product is conveyed onto a tray through one conveying belt, a hydraulic rod pushes the tray to rise and slowly enter the cylinder wall, after the tray completely enters the cylinder wall, a relative airtight state is formed between two supporting sides of the tray, at the moment, a clamping groove and a clamping rod are located at the same horizontal height, and a magnet in the clamping groove attracts the clamping rod to move leftwards and enter the clamping groove.