Steel and wood combined composite sleeper

The utility model belongs to building support materials and particularly relates to a steel and wood combined composite sleeper. The steel and wood combined composite sleeper comprises a sleeper body and two symmetric steel jackets, and is characterized in that two pairs of grooves are symmetrically arranged on two sides of the sleeper body respectively, the two symmetric steel jackets wrap the sleeper body and are respectively nested in the two pairs of grooves to form two pairs of reinforcing ribs. The steel and wood combined composite sleeper has the advantages that since two reinforcing ribs are additionally arranged in original steel sleeper, the steel and wood combined composite sleeper is high in bending resistance and higher in strength. Furthermore, wood portions of the upper and lower sides of the steel and wood combined composite sleeper are exposed, a metal backing plate on the upper side is not easy to slip and high in safety. The wood portions in the middle of the steel jackets is composed of al