Abstract: Carbon structural steel Q235 is being widely used in engineering and general machine parts. The study of the structure and forming properties at different plastic molding temperatures plays an important role in the expansion of the size range of Q235 precision forming and realizing the aim of less/non-cutting forming of parts. Through the analysis of the mechanical properties, the degree of oxidation and the structure of Q235 in the plastic forming temperature range, the temperatures of the beginning and final forging were determined.