DPF regeneration control method

The invention relates to the technical field of internal combustion engine postprocessors, in particular to a DPF regeneration control method which comprises the steps that S1, the total heat Q generated in the boot combustion process in a DPF is calculated; s2, a DPF temperature model is established, the DPF temperature model is divided into i independent fragmentation units, a distribution coefficient ki is calibrated for each fragmentation unit, heat Qi generated by each fragmentation unit in the boot combustion process is equal to ki * Q, and k1 + k2 +... + ki = 1; s3, the carrier temperature Tcelli of each fragment unit is calculated, and the maximum value Tcellmax is determined; and S4, the maximum value Tcellmax is compared with a regeneration threshold value T ', if Tcellmax is smaller than T', the DPF enters a regeneration mode, if Tcellmax is larger than or equal to T ', the DFP enters a cooling mode, and when Tcellmax is smaller than T', the regeneration mode is recovered. According to the method,