A method of making electronic product casing by mao bamboo, at first, selecting crude mao bamboo, bleaching it by bleaching powder or chlorine water and so on solvents, then performing insect disinfestations, drying and carbonization, rough washing by water, then finish washing to make the semi-finished product; making corresponding television, computer and so on electronic product casing mould, processing by 300 DEG C to 500DEG C, bonding the mould by adhesive to make the required mould, compacting the bamboo mould by machine tool to firm it, and spraying paint on the surface, namely obtaining the electronic product casing made of mao bamboo. The making method makes the casing using the mao bamboo to replace the plastic product, with saving cost and environmental protection and beautiful shape.