Fixed-length cutting mechanism

The utility model relates to the technical field of reinforcing steel bar processing, and discloses a fixed-length cutting mechanism which comprises a table, a distance plate with the adjustable position is arranged on the table, a hydraulic device is installed on the side face of the table, a cutting tool is assembled at the output end of the hydraulic device, a cutting base with the adjustable position is installed on the top face of the table, and a cutting tool is assembled at the output end of the cutting tool. A flow guide inclined face is arranged on the top face of the table, an adjusting assembly is arranged on the top face of the table, and a pressing assembly is further arranged on the table. When the steel bar cut-off device is used, the rollers can tightly press the steel bars, so that the steel bars are positioned, the steel bars are prevented from shaking in the cut-off process, the flatness of the cut-off surfaces of the steel bars is guaranteed, workers do not need to trim the cut-off surface