Cooked pig's trotters may have some fishy smell, which is usually emitted by protein and other substances formed during cooking. In order to eliminate this fishy smell, the following measures can be taken:

1. Preheat the saucepan: Preheat the saucepan before cooking the trotters. This helps to make the pig's trotters release protein and other ingredients more easily in the cooking process, and reduce the fishy smell.

2. Add spices and herbs: When cooking trotters, you can add some spices and herbs, such as star anise, cinnamon, cloves, herbs, etc., to help eliminate the fishy smell of trotters.

3. Add ginger and garlic: Ginger and garlic can produce fragrance during cooking, which helps to reduce the fishy smell of pig's trotters. Can be cut into pieces or small pieces and added to pig's trotters.

4. Extend the stewing time: In the process of boiling pig's trotters, the stewing time can be extended, which will help protein and other ingredients in pig's trotters to be better dissolved in water and reduce the fishy smell.

5. Cold treatment: If you have noticed the fishy smell of trotters, you can soak them in cold water for a period of time, which will help reduce the fishy smell and restore the taste of trotters.

How to remove the fishy smell of cooked pig's trotters? These are some methods that may be helpful, but they may also vary from person to person. If you are not sure how to eliminate the fishy smell of pig's trotters, it is recommended to consult an experienced chef or chef.