A composite including coffee grounds and the method for preparing the same are disclosed. The method includes drying 20˜50 wt % of coffee grounds such that the water content of the coffee grounds is 0.1%˜3%, then stirring and mixing the dried coffee grounds with 40˜70 wt % of plastic, 5˜25 wt % of calcium carbonate and 3˜10 wt % of mix modifier, and then performing granulation to form granular composite.
