Based on the research progress of solar greenhouse structure optimization（SGSO） in recent years, combined with the current situation of greenhouse structure research, the further research direction of greenhouse structure optimization is analyzed. It is considered that further study is needed in several aspects: The value of load of new materials and new equipment and its combinational principle. Look for the span, ridge height and reasonable space between greenhouses to determine the thickness of earth back wall. The influence of the shape of day lighting surface on the illumination uniformity in solar greenhouse, topology optimization, shape optimization, section optimization and other theories are applied to optimize the truss structure of solar greenhouse based on the lighting conditions and indoor crop growth model. Determine the geometry of a large solar greenhouse and the correlation between thermal insulation and strength requirements for rear walls.