The invention provides a supporting method for increasing a contact area between a bottom plate of a reactor body and a base platform and a supporting structure thereof. The method comprises a step of filling binding agent into a space between the bottom plate of the reactor body and the base platform, so a bonding layer is formed therebeween. The contact area of the bottom plate of the reactor body and the base platform is increased because an upper surface of the bonding layer is bonded with the bottom plate of the reactor body and a lower surface of the bonding layer is bonded with the base platform, thereby vibration of the bottom plate of the reactor body is reduced.
