The invention relates to a tidying and transferring device for kelp after being harvested. The tidying and transferring device comprises a kelp tidying device and a rotary folding-arm transferring device; the kelp tidying device comprises a driving chain wheel, a driven chain wheel and a chain, the chain is provided with a long pin shaft and a short pin shaft; the long pin shaft is connected witha hook through a connecting sleeve, so that the hook advantageously carries a growing rope with attached kelp to move evenly; the long pin shaft and the short pin shaft are arranged on the two sides of the chain in a staggered mode; pins are mounted on the long pin shaft and the short pin shaft, and the pins and an outer chain piece are fixed, so that the hook does not overturn and invert during hoisting the kelp growing rope; the long pin shaft and the short pin shaft of the chain are each provided with a left side rolling wheel and a right side rolling wheel, and the two rolling wheels are mounted on the two sides of the chain and are arrayed in a spaced mode; a hoisting part which can rotate by 360 degrees is arranged on the top of the kelp tidying device, so that the growing rope bestrewn with the kelp enters the tidying device from one sides of different directions; and the rotary folding-arm transferring device can lift the kelp tidying device up and rotate to a cabin of a kelp harvesting ship.