Specifically depends on the type and size of the crab to determine, generally speaking, cooking 15-20 minutes can be, usually in the water boil start timing, pay attention to not less than 15 minutes, otherwise it can not play a role in what sterilization. Cooking too long will also affect the meat quality of the crab, so it is best to control the time within 15 to 20 minutes.

Look at the color of the crab's shell, if the crab's shell shows an orange-red color, the crab is cooked.

Look at the softness of the crab's shell. Generally speaking, the shell of a cooked crab will be soft.

If the shell appears reddish-brown, it proves that the crab has been cooked for a long time and the meat is not good.

If the shell is reddish-brown, the crab has been cooked for too long and the meat is not good.