1. Fresh sea crabs need to bind their legs and feet for a long time, put them in a foam box, add water to the foam box until the water does not reach the surface of the crab, then cover the foam box and put it in the freezer for freezing.

2. If you want to preserve crabs for a long time, you can cook the whole crab first, cool it to room temperature, put it in a fresh-keeping bag, tie the bag tightly and put it in the freezer, so that it can keep fresh for 1 month, but it is best to eat it early, which will easily lose freshness and affect the original taste and mouthfeel.