NOVELTY - A river crab culturing method involves establishing crab pond by selecting rectangle crab pond, followed by controlling water depth, freeze-drying the pond bottom in winter to kill wild fish, applying chicken manure after sterilizing and fermenting the pond, cleaning waterweed and wheel blade black algae, controlling shallow water depth, inletting water through 20 mesh filter net, feeding snails, breeding juvenile crab. The crab is transferred to annular groove temporarily culturing water area, followed by feeding fodder, controlling the water quality, and preventing and treating diseases.    USE - Method for culturing river crab.    ADVANTAGE - The method enables culturing river crab with better cultivation effect, better taste, better quality, improved medicinal value and better nutrient content in a simple, feasible and inexpensive manner.    DETAILED DESCRIPTION - A river crab culturing method involves establishing crab pond by selecting rectangle crab pond length-width ratio of 3: 2 in an east-west direction and cultivating area of 3000-4000 square meter, where the pond bottom is provided with circular shape, sand soil and water drainage capacity, followed by controlling water depth to 0.1-2.0 meter and average water depth to 1 m, where the water is lake water or river water, freeze-drying the pond bottom in winter to kill wild fish, applying 150-180 kg chicken manure after sterilizing and fermenting the pond, cleaning waterweed and wheel blade black algae, controlling shallow water depth to 0.1 m, inletting water through 20 mesh filter net, feeding snails, breeding juvenile crab by sterilizing 1000-1500 number crab with 3-5% salt water for 5-15 minutes. The crab is transferred to annular groove temporarily culturing water area, followed by feeding fodder such as float grass, wheat, corn, rice, bean cake and bran, clam, mussel, shrimp, blood powder, silkworm pupa, fly maggot, earthworm and young insects, controlling the water quality by improving water temperature and promoting exuviations, and dissolved oxygen, timely changing water, preventing and treating diseases such as rotten disease, limb edema disease by using quicklime, and sulfonic amine type feed, preventing water mildew disease by using 0.25 ppm malachite green, fiber hair disease by using 30% or 5-10 ppm alcohol, crab merino by washing the crab with 5 ppm copper sulfate solution for 10-20 minutes and a nematode disease by using geramine solution to obtain a finished product.