The invention relates to a directional 
mating and breeding method in 
Eriocheir sinensis breeding, comprising the following steps of: referring to the 
Eriocheir sinensis standard GB / T19783-2005, selecting male and female 
Eriocheir sinensis individuals with mature gonads from different 
species groups in the first ten-day period of November as parents, after labeling, breeding the male and female Eriocheir sinensis individuals separately, and strengthening cultivation; in the last ten-day period of November, 
pairing and putting the parents subjected to cultivation strengthening into cylindrical net cages weaved by 
polyethylene soft plastic, wherein each cylindrical net cage is 50 cm in 
diameter and 60 cm in height, and the 
salinity of water is 0.209; distributing a male crab for each net cage, wherein the ratio of female to male of full sib directional 
mating is 1:1, and the ratio of female to male of half-sib directional 
mating is 2: 1 or 3: 1; putting the obtained egg-carrying crabs into a 2*667 m<2>*1.5 m outdoor soil pond for 
overwintering cultivation; in the middle ten-day period of April of next year, pumping out the water in the pond to catch the egg-carrying crabs, putting the egg-carrying crabs into cylindrical net cages weaved by 
polyethylene soft plastic, wherein the cylindrical net cages are respectively 20 cm in 
diameter and 50 cm in height and are respectively arranged in net boxes in size of 3*2*1.5 m in other soil ponds respectively, and one egg-carrying crab is arranged in each net box; after the culturing of young crabs is finished, taking out the parents, and performing soil pond cultivation for the 
juvenile crabs according to the Eriocheir sinensis artificial breeding standard SC / T1099-2007.