The invention provides a narrow-gauge hopper car. The narrow-gauge hopper car comprises a traveling device (2), a carriage (9) and a frame (10), wherein the top of the frame (10) is fixedly connected with the carriage (9); the bottom of the frame (10) is fixedly connected with the traveling device (2); the traveling device (2) comprises wheels (202) and wheel axles (203); the corresponding wheels (202) are mounted at two opposite ends of each wheel axle (203); and the gauge formed between the wheels (202) on each wheel axle (203) of the traveling device (2) is smaller than a standard gauge. Preferably, the gauge formed between the wheels (202) on each wheel axle (203) is 580 mm. The axle load of the hopper car can be reduced, the occupied area of the hopper car during transportation can also be reduced, therefore, requirements to line construction and tracks are greatly reduced, and the corresponding track construction cost is greatly reduced. The narrow-gauge hopper car is particularly suitable for small-batch cargo transportation or a freight place with small area, and has the outstanding advantages of energy conservation, consumption reduction, cost saving and the like.