The premise is that crabs are alive, and crabs can be cooked in two ways, one is whole cooking; There is also frying it. What you mean by killing crabs is actually how to cut crabs into blocks. The specific steps are: 1. Clean the crabs, brush the crab body, claws (also called crab tongs) and crab feet with a brush, and then rinse them with clear water; 2. Cut off the pincers first, so as to avoid biting hands; Then dig out the navel of the crab and cut it off with a knife; Then turn the crab over and cut it off with kopis, so as to avoid the loss of crab roe to the maximum extent; After cutting in half, you can cut the cut crab into smaller pieces as needed.