Convenient steel plate welding cutting rail extension device

The invention discloses a convenient steel plate welding cutting rail extension device. The device comprises a platform, and further comprises at least one wedge block; the platform is provided with aconnecting unit for connecting to the edge of a steel plate to be welded in a disassembly mode; the connecting unit comprises at least two square steel arranged on the upper surface of the platform and extending to the outer side of the platform, and at least one flat iron arranged on the lower surface of the platform and extending to the outer side of the platform; the flat iron and the square steel are arranged on the same side, and at least one flat iron is positioned between the two square steel; the vertical distance between the flat iron and the square steel is larger than the thicknessof the steel plate to be welded; and the wedge block is used for embedding in a gap between the flat iron and the steel plate to be welded. The device has the advantages of stable connection and convenient disassembly of the