A DPF regeneration trigger control method, comprising the following steps: setting an active trigger differential pressure and an initial trigger differential pressure, wherein the initial trigger differential pressure is less than the active trigger differential pressure; and collecting a differential pressure of the DPF in real time during a vehicle travelling process, and performing the following determination and control: if the differential pressure is greater than the active trigger differential pressure, controlling the vehicle to actively start DPF regeneration; otherwise, if the differential pressure is greater than the initial trigger differential pressure, determining whether an exhaust temperature of an engine reaches a passive DPF regeneration required temperature, and if so, triggering passive DPF regeneration; otherwise, predicting, according to a gradient of a road ahead, a probability of starting DPF regeneration within a predicted distance ahead of a current position of the vehicle, the probability of starting DPF regeneration being calculated as proportion D = T 1 T 2 ∩ T min T max T max − T min of an intersection of an exhaust temperature range [ T 1, T 2] corresponding to the position and a passive DPF regeneration required temperature range [ T min, T max], said intersection divided through the difference between T max and T min, where T 2 represents the maximum isothermal curve value, T 1 represents the minimum isothermal curve value, T max represents the maximum value in the passive DPF regeneration required temperature range, T min represents the minimum value in the passive DPF regeneration required temperature range, and if the probability is greater than a probability threshold, controlling the vehicle not to start DPF regeneration; otherwise, controlling the vehicle to actively start DPF regeneration. setting an active trigger differential pressure and an initial trigger differential pressure, wherein the initial trigger differential pressure is less than the active trigger differential pressure; and collecting a differential pressure of the DPF in real time during a vehicle travelling process, and performing the following determination and control: if the differential pressure is greater than the active trigger differential pressure, controlling the vehicle to actively start DPF regeneration; otherwise, if the differential pressure is greater than the initial trigger differential pressure, determining whether an exhaust temperature of an engine reaches a passive DPF regeneration required temperature, and if so, triggering passive DPF regeneration; otherwise, predicting, according to a gradient of a road ahead, a probability of starting DPF regeneration within a predicted distance ahead of a current position of the vehicle, the probability of starting DPF regeneration being calculated as proportion D = T 1 T 2 ∩ T min T max T max − T min of an intersection of an exhaust temperature range [ T 1, T 2] corresponding to the position and a passive DPF regeneration required temperature range [ T min, T max], said intersection divided through the difference between T max and T min, where T 2 represents the maximum isothermal curve value, T 1 represents the minimum isothermal curve value, T max represents the maximum value in the passive DPF regeneration required temperature range, T min represents the minimum value in the passive DPF regeneration required temperature range, and if the probability is greater than a probability threshold, controlling the vehicle not to start DPF regeneration; otherwise, controlling the vehicle to actively start DPF regeneration. if the differential pressure is greater than the active trigger differential pressure, controlling the vehicle to actively start DPF regeneration; otherwise, if the differential pressure is greater than the initial trigger differential pressure, determining whether an exhaust temperature of an engine reaches a passive DPF regeneration required temperature, and if so, triggering passive DPF regeneration; otherwise, predicting, according to a gradient of a road ahead, a probability of starting DPF regeneration within a predicted distance ahead of a current position of the vehicle, the probability of starting DPF regeneration being calculated as proportion D = T 1 T 2 ∩ T min T max T max − T min of an intersection of an exhaust temperature range [ T 1, T 2] corresponding to the position and a passive DPF regeneration required temperature range [ T min, T max], said intersection divided through the difference between T max and T min, where T 2 represents the maximum isothermal curve value, T 1 represents the minimum isothermal curve value, T max represents the maximum value in the passive DPF regeneration required temperature range, T min represents the minimum value in the passive DPF regeneration required temperature range, and if the probability is greater than a probability threshold, controlling the vehicle not to start DPF regeneration; otherwise, controlling the vehicle to actively start DPF regeneration.