The invention provides a railway loading device, relates to a railway gondola car loading system, in particular to a quantitative weighing type railway gondola car loading system. The railway gondola car loading system consists of a shunting machine, a loading machine, a loading building, gondola car rails and a gondola car fixing device, wherein the fixed loading building is built in a way of stepping over the gondola car rails, the loading machine is arranged in the loading building, and the shunting machine is used for realizing the alignment of a gondola car arranged on the gondola car rails to a material outlet of the loading machine. The railway gondola car loading system is characterized in that the gondola car fixing device is arranged on the gondola car rails, one side of the gondola car rails is provided with shunting machine rails, the shunting machine freely runs on the shunting machine rails, and the shunting machine, the gondola car fixing device and the loading machine are connected with a programmable logic controller (PLC) control system for whole-process variable frequency speed regulation automatic control. The railway gondola car loading system has the characteristics that the structure is novel, the layout is reasonable, the fund is saved, the positioning is accurate, the loading efficiency is high, the labor and the time are saved, safety and reliability are realized, and the like. Therefore, the railway gondola car loading system belongs to a novel railway gondola car loading system integrating economy and practicability.