DES-DF7G diesel locomotive equipped a 1,840 kW diesel engine, brushless excitation alternator, AC auxiliary transmission system and three-axle bogies. The traction motor is provided with roller bearing suspended installation. Type JZ-7 brake equipment is used for the braking system so as to brake the locomotive independently or together with the whole vehicles trailed. Electric resistance brake can also be applied on long down gradient. There are electronic injection and mechanical injection methods for users to choose.

The locomotive features good performance, low oil consumption, reliable operation, easy maintenance and comfortable working conditions.

Modular structure is applied in new design. It is better for reduce repairing and running expense.