The invention discloses a DPF active regeneration safety control method, and belongs to the technical field of regeneration safety. The DPF active regeneration safety control method comprises the following steps that S10, regeneration conditions are judged; S20, the HC injection condition is judged; S30, the amount of HC needing to be injected to reach T0 is calculated, T1=T0-T2, T2 is the buffer temperature, and T2 is gradually reduced to 0 along with reduction of the carbon loading amount and increase of the regeneration time t1; and S40, temperature control is conducted. In the step S10, when one of operation condition parameters of an engine reaches a regeneration threshold value corresponding to the parameter, a DPF enters active regeneration; in the step S20, when T4 is greater than or equal to T7, the HC injection condition is met; and in the step S40, when T5 is greater than T0 and less than or equal to T3, the initial HC injection amount is reduced, the change rate of HC injection is reduced, when T5 is greater than T3 and less than or equal to T6, the injection amount of HC is reduced, and the amount of tail gas exhausted into the DPF by the engine is increased, and when T6 is less than T5, HC injection is stopped, and the amount of the tail gas exhausted into the DPF by the engine is increased. The DPF active regeneration safety control method has the following beneficial effect that the safety of active regeneration of the DPF can be high.