We can use the alkalinity of rice washing water and the floatability of salt water to separate maggots from Tricholoma matsutake and then wash them. The specific operation is as follows:

1. First put the rice in the water to wash the rice, and pour out the first rice washing water. Rice washing water is alkaline, and maggots will crawl out when it meets alkaline water.

2. Pour the rice washing water into another container and wash rice for the first time. The alkalinity of the rice washing water behind is too little, which is easy to dilute the alkalinity of the first time.

3. Then add some edible salt to the rice washing water just now. Edible salt will change the buoyancy of water, and the maggots that climb out will be separated from the pine mushrooms.

4. Then unpack the dried Tricholoma matsutake. Be careful not to soak in advance. Soaked pine mushrooms are soft, and insects crawl inside.

5. Soak Tricholoma matsutake in rice washing water for half an hour, and then wash it off after the maggots in Tricholoma matsutake climb out and float.