1, to make sweet potato flour first of all, we must first prepare a large number of sweet potatoes, and pick out the ones with wormholes or rotten ones, if you don't pick them out, it will affect the quality of sweet potato flour. So, this step must be done well.

2, after picking out the sweet potatoes, is to wash the sweet potatoes, be sure to clean the sweet potatoes, and drain the water on the surface of the sweet potatoes.

3, then, take the drained sweet potatoes to the processing of grated.

4, the next step is to prepare a good filter, filter racks and a large tank used to contain filtered water, and then the grated sweet potatoes with water to dissolve, and then poured into the filter, and then use your hands to squeeze the water out of the water, which squeezes out of the water precipitation is the groundnut flour.

5, precipitation of about 12 hours or so, you can pour the water out of the tank, and then get the sediment out into other barrels, the top and then put some water to continue to soak, the purpose is to bleach the impurities inside.

6, change the water every day, about 3-5 days you can dig out and pinch into small pieces in the sun to dry, if the sun is enough, usually a day can be put away.