NOVELTY - Preparing mulberry branch particles, comprises (i) cutting mulberry tree branches during sericulture process, and using as a starting material; (ii) performing primary drying under natural sunlight; (iii) crushing, and drying mulberry branch powder; (iv) uniformly mixing the mulberry branch powder by adding an auxiliary material, and drying to obtain mixed powder, where the auxiliary material is river mud in powder and saw dust, grass clippings or straw cuttings; and (v) performing compression molding of mixed powder by placing in a compression molding machine to obtain granular materials.    USE - The mulberry branch particles are useful in bio-fuels (claimed).    ADVANTAGE - The method produces large amount of mulberry branches during sericulture process; utilizes waste of mulberry branches as main raw material, and silkworm industry by-products of mulberry branches, renewable raw material sources; is economical; improves the economic benefits of traditional sericulture industry; and has significant role in increasing farmer's income. The mulberry branch particles produce bio-fuel having high combustion property, where the combustion process does not produce smoke, and carbon dioxide and sulfur dioxide emissions; controls environmental pollution.    DETAILED DESCRIPTION - Preparing mulberry branch particles, comprises (i) preparing the raw material by cutting off the mulberry tree branches during sericulture process, and using as a starting material; (ii) performing primary drying process of the mulberry branches by placing under natural sunlight; (iii) crushing the primarily dried mulberry branches using a crusher into particle size of 3 mm to obtain the mulberry branch powder, and drying the mulberry branch powder until the water content reaches 11-15%; (iv) uniformly mixing the mulberry branch powder by adding an auxiliary material, and drying to obtain mixed powder, where the auxiliary material is river mud in powder and saw dust, grass clippings or straw cuttings; and (v) performing compression molding of mixed powder by placing in a compression molding machine to obtain granular materials.