The invention provides a generator having an assembled hexagon engine base structure. The generator is characterized in that the engine base of the generator is of assembled hexagon structure, and an engine upper plate, an engine lower plate, and a footing plate are assembled together with an upper fixing rod, a side fixing rod, and a lower fixing rod into an integrated hexagon structure through bolts so as to enable the engine base to bear the weight of the generator and connect other parts. A front end cover and a rear end cover are connected to the lower fixing rod, the side fixing rod and the upper fixing rod through bolts. A box body combination set is mounted on the engine upper plate. According to the invention, the generator has the following beneficial effects: since the engine base of the generator adopts the assembled hexagon structure, the generator has simple processing technology, lower manufacturing and material cost, high production efficiency, novel appearance, large heat radiation area and low temperature rise, and is especially suitable to low power and mass production.