The invention discloses a steel and concrete beam cast pedestal. A concrete substrate is adopted. The steel and concrete beam cast pedestal is characterized in that the concrete substrate is provided with a steel structure longitudinal beam along the length direction of a prefabricated box beam. The steel and concrete beam cast pedestal has a steel and concrete structure, reduces the application amount of templates, simplifies the manufacturing procedure by the splicing structural form, and has the advantages of quick and convenient construction and short construction period; and the steel structure longitudinal beam can be recycled so as to avoid waste.