Steamed crabs are steamed for 15 minutes after boiling water for crabs weighing less than 3 taels, steaming for 17 minutes for crabs weighing 3 taels to 4 taels, and 20 minutes for crabs weighing more than 4 taels. Generally, the crabs are steamed for every tael the weight of the crab increases. , the time increases by about two minutes. If the time is not enough, the crab will be raw. Crabs have certain toxicity and parasites. If the time is not enough, it will not be easy to kill and destroy the toxicity and parasites. But if the time is too much, the crab will lose its delicious taste and it will not be easy to separate the meat and shell. It is more inconvenient to eat.