The invention provides an extruded side-emitting light bar comprising a light bar body. The light bar body comprises a light-emitting assembly and an extrusion molded shell, wherein the light-emitting assembly comprises a rigid high-temperature protection plate, a PCB light panel, and a U-shaped light guide TPU adhesive layer. Light beads are disposed at a front side of the PCB light panel. A rear side of the PCB light panel is fitted and connected with the rigid high-temperature protection plate, while the front side of the PCB light panel is fitted and connected with the U-shaped light guide TPU adhesive layer. The invention also provides a production method for the extruded side-emitting light bar. The production method has the advantages that the PCB light panel and an inner shell can be distinguished by means of the rigid high-temperature protection plate and the U-shaped light guide TPU adhesive layer, respectively, in order to avoid burn of the PCB light panel by the inner shell extruded at a high temperature and to prevent bending of the PCB light panel and damage of the light beads under pushing of a high-speed outgoing plastic melt; therefore, the PCB light panel and the light beads may be well protected, and thus allowed to each have a prolonged service life.