After the end of the Second World War, eastern Upper Lusatia and Kohlfurt came under Polish administration. Until September 6, 1947, Kohlfurt and the train station were called Kaławsk. Since September 1947, the city and train station have been named Węgliniec. The Polish State Railways took over the station facilities after the end of the war. The electrification on the route to Lubań fell under the Soviet reparation requirements and was dismantled. The double track railway line to Żary was also affected by reparations, with one track being dismantled.
On the north side of the train station, an extensive marshalling yard was built, with 18 tracks accessible from both east and west, three stub tracks on the east side, and three stub tracks on the west side. Depending on the destination, the freight trains could be broken up from humps at either the east end or the west end. An operator tower was built for the western hump, from which the remote-controlled retarders could be controlled. The southern ten tracks were integrated with through routes, and have exit signals to the east. The importance of the humps at the exit to Lubań and in the central southeast area decreased sharply.
In 1966 passenger services on the small train to Czerwona Woda were discontinued. The branch to the former pit city of Zielonka was closed in the mid-1970s.
Electrification did not reach Węgliniec until 1985, when the line from Legnica (Liegnitz) was electrified. Electrification of the railway line to Lubań followed in 1987. In order to implement the German-Polish agreement on the "further development of the railway connections Berlin - Warsaw and Dresden - Wrocław (E 30 / CE 30)", the remnant between Węgliniec and the eastern bridgehead of the Neißebrücke near Horka was electrified in 2008. The railway lines towards Wrocław, Görlitz and Horka were also modernized as part of the agreement.
