Bar forming machine

A bar forming machine at least comprises a machine frame which is at least provided with a horizontal extrusion forming cylinder body. A hydraulic oil cylinder with a piston rod is arranged on one side of a feeding opening of the cylinder body. The piston rod is connected with extrusion blocks through connected extrusion rods, the extrusion blocks are placed in a cylinder body inner extrusion cavity and have the same cross section shape, and the extrusion blocks are in movable fit. A blanking opening communicated with the cylinder body inner extrusion cavity is formed in the inner side of the feeding opening of the cylinder body. The blanking opening is provided with a hopper, and a bar extrusion molding device is formed. The extrusion forming cylinder body is a square column-shaped cylinder. An extrusion end of the cylinder body inner extrusion cavity is a contracting forming opening formed by the fact that the extrusion end and an extrusion cavity inner square column-shaped cavity gradually shrink and are i