A sweet corn silk leached tea composition, and a method for preparing the corn silk leached tea composition are provided to obtain the useful effect for preventing obesity and constipation. A sweet corn silk leached tea composition comprises 20-70 wt% of corn silk; 17-40 wt% of raw buckwheat; 10-30 wt% of the processed green tea; and 3-10 wt% of stevioside.
