The invention discloses a roadway supporting device. An upper arch-shaped supporting steel plate is formed by fixedly connecting two arc-shaped steel plates through a connection fastening assembly; the upper arch-shaped supporting steel plate and a lower supporting steel plate are also connected and fixed through a connection fastening assembly; a fixed base is fixedly arranged at the lower end of the lower supporting steel plate; wave-shaped elastic steel sheets for enabling a protective net to be clung to a coal wall are arranged between the protective net and the upper arch-shaped supporting steel plate and between the protective net and the lower supporting steel plate; the upper arch-shaped supporting steel plat and the lower supporting steel plate are connected together through the special connection fastening assembly so that the connection stability is improved; the wave-shaped elastic steel sheets are arranged so that the protective net can be in close contact with the coal wall all the time, the supporting effect is improved, and a base is supported very well, and furthermore, the whole stability of supporting is improved; and a connection anchor rod for anchoring is arranged at a connection part of the upper arch-shaped supporting steel plate and the lower supporting steel plate, so that the integrity and the stability of roadway supporting and anchoring are guaranteed and the safety of a roadway is guaranteed.