NOVELTY - To provide a method for increasing generation efficiency of hydrogen ions and electrons and decreasing concentration of methanol that arrives at an electrolyte membrane by laying up catalyst membrane formed channels in a row or in series, and a method for easily assembling the base substrate by applying a projection conductor heating methanol when welding and assembling a base substrate.    DETAILED DESCRIPTION - The base substrate for laying up channels in a line is characterized in that the channel are formed on a base substrate in such a shape that a fuel passageway of the channels is maximized when passing a fuel through the passageway, and a catalytic material is partially coated on the surface of the channels. The partition of a base substrate for laying up channels in a line is characterized in that a partition for maintaining airtightness of the channels during laying up is engraved on the base substrate with being parallel to the channels and formed in a triangular cross-sectional shape. The base substrate (400) for laying up channels (402) in series is characterized in that the channels are formed on a base substrate in such a shape that a fuel passageway (415) of the channels is maximized when passing a fuel through the passageway, the channels are formed in such a way that a fuel gas injected into a fuel injection port in a series channel laying up structure pass through lower layers and intermediate layers in series, and a catalytic material is partially coated on the surface of the channels. The partition (401) of a base substrate for laying up channels in series is characterized in that a partition for maintaining airtightness of the channels during laying up is engraved on the base substrate with being parallel to the channels and formed in a triangular cross-sectional shape. The fuel reformer applied to direct methanol fuel cell (DMFC) is assembled by laying up and bonding at least three or more layers including a lower layer, an intermediate layer and an upper layer so that channels are laid up in a row by using the base substrate.