Diesel particulate trapping and regenerating system and control method thereof

The invention relates to a diesel particulate trapping and regenerating system and a control method thereof. The diesel particulate trapping and regenerating system comprises an engine, a heating device, a trapping device, a regeneration device and a control module, wherein a cooling medium is arranged in a first cooling pipeline, and an exhaust pipeline is used for exhausting tail gas; the heating device is connected to the first cooling pipeline; the trapping device comprises a trap with an inlet end and an outlet end, and the inlet end is communicated with the exhaust pipeline; and the regeneration device comprises a regeneration heater connected to the trap. The control method of the diesel particulate trapping and regenerating system comprises the steps that before regeneration treatment is conducted on the trap, the heating device is started through a control module, the cooling medium is heated, and/or a regenerating heater is started through the control module, and the temperature of the inlet end is