Improved ecological river crab breeding method

The invention provides an improved ecological river crab breeding method. According to the improved ecological river crab breeding method disclosed by the invention, before breeding, a water body purification treatment is performed, and magnesium hydroxide is used as a main component of a purifying agent, so that the content of hydrogen sulphide in breeding water and a watercourse can be effectively reduced, and good improvement effects on too low PH value of water quality and eutrophication can be achieved; and in the breeding process, an adopted calcium complementing agent is an alkaline solution, wherein calcium nitrate can directly complement calcium in breeding farms, and zeolite powder can remove 95% of ammonia nitrogen in water, purify the water quality, relieve the phenomena of being extremely low in oxygen producing capacity of water bodies and extremely large in oxygen consumption of respiration of beings, effectively absorb hazardous substances of ammonia nitrogen, nitrite,algal toxins and the like