The utility model belongs to the control technology of an open normal-pressure air-cooled low-power fuel cell, in particular to a power generation controller for a fuel cell. The power generation controller comprises a CPU connected with a main DC/DC unit; the output end of the CPU is connected with an electromagnetic valve output unit; the CPU is also connected with a system power supply and auxiliary DC/DC unit; due to the adoption of the power generation controller, the driving for equipment, such as heat elimination fans, reflection blowers, circulating pumps, environment blowers, internal heat elimination fans, air intake valves and the like, is realized; and the shunt-wound matching between a plurality of fuel cells and between the fuel cells and the auxiliary battery is realized. Therefore, the power generation controller has the advantages of small system size, high integration level, high conversion efficiency, simple interface, high reliability, and reduced costs for system production, use and maintenance.