1, if it is a river crab. Dead crabs are not edible. Dead crabs are not only polluted by a large number of bacteria, but also produce substances harmful to human body.

2. If it is a sea crab. If the time of death is within one hour, you can eat it. You need to clean the sides, back and legs of the crab with a brush, and clean all the dirty things in the lid, such as crab intestines.