Abstract: The present invention relates to a method for regenerating a particle filter (10) arranged in the exhaust line (12) of an internal-combustion engine, notably of diesel type, wherein the clogging state of the filter is evaluated, this state is compared with a threshold value, then, if this threshold value is exceeded, a fluid and a fuel are mixed together, this mixture is subjected to catalytic combustion to generate the hot gases required for regeneration of the filter and regeneration of the filter is carried out by means of hot gases flowing through said filter and whose temperature is sufficiently high to provide combustion of the particles retained in this filter. According to the invention, prior to mixing the fluid and the fuel, the temperature of the fluid is raised up to the catalytic combustion light-off temperature.