A method for controlling a hybrid powertrain equipped with a particulate filter in the exhaust line, comprising the following steps: • determining the temperature of the particulate filter and the particulate mass in the particulate filter, then triggering the regeneration of the particulate filter, when the particulate mass reaches a predetermined threshold and when the temperature in the particulate filter is greater than or equal to a predetermined threshold temperature, the air flow admitted into the engine is controlled so as to be equal to a maximum air flow, • determining the temperature of the particulate filter and the particle mass, and then determining whether the current temperature of the particulate filter is below a modulation temperature, • if this is the case, maintaining the current airflow setpoint and then resuming the process with a comparison of the current temperature of the particulate filter and the modulation temperature, • if the temperature of the particulate filter is greater than or equal to the modulation temperature, modulating the airflow setpoint supplied to the in order to slow down too rapid a rise in the internal temperature of the particulate filter, CHARACTERIZED IN THAT, in order to modulate the temperature of the particulate filter, the following steps are carried out: • reducing the air flow in stages until the minimum air flow achievable by the engine is reached, • when the minimum flow rate achievable by the engine is reached, it is determined whether the temperature of the particulate filter is less than or equal to the maximum temperature of the particulate filter, • if this is the case, determining whether the temperature of the particulate filter is less than or equal to the modulation temperature, • if it is not, maintaining the minimum air flow and resuming the process with the step of comparing the temperature of the particulate filter with the maximum temperature of the particulate filter, • if this is the case, defining a new maximum airflow setpoint, which is higher than the current maximum airflow setpoint, and controlling the intake airflow to reach this new maximum airflow setpoint, • the process then resuming with a comparison of the current temperature of the particulate filter and the modulation temperature. • determining the temperature of the particulate filter and the particulate mass in the particulate filter, then triggering the regeneration of the particulate filter, when the particulate mass reaches a predetermined threshold and when the temperature in the particulate filter is greater than or equal to a predetermined threshold temperature, the air flow admitted into the engine is controlled so as to be equal to a maximum air flow, • determining the temperature of the particulate filter and the particle mass, and then determining whether the current temperature of the particulate filter is below a modulation temperature, • if this is the case, maintaining the current airflow setpoint and then resuming the process with a comparison of the current temperature of the particulate filter and the modulation temperature, • if the temperature of the particulate filter is greater than or equal to the modulation temperature, modulating the airflow setpoint supplied to the in order to slow down too rapid a rise in the internal temperature of the particulate filter, • reducing the air flow in stages until the minimum air flow achievable by the engine is reached, • when the minimum flow rate achievable by the engine is reached, it is determined whether the temperature of the particulate filter is less than or equal to the maximum temperature of the particulate filter, • if this is the case, determining whether the temperature of the particulate filter is less than or equal to the modulation temperature, • if it is not, maintaining the minimum air flow and resuming the process with the step of comparing the temperature of the particulate filter with the maximum temperature of the particulate filter, • if this is the case, defining a new maximum airflow setpoint, which is higher than the current maximum airflow setpoint, and controlling the intake airflow to reach this new maximum airflow setpoint, • the process then resuming with a comparison of the current temperature of the particulate filter and the modulation temperature.