The research in this article is conducted to discuss on the application effect of basic magnesium sulfate cement in civil engineering. Research and Analysis are conducted on strength of reinforced concrete material, structural member corrosion rate and flexural member bearing capacity of reinforced concrete by taking basic magnesium sulfate cement as the research objective. Basic magnesium sulfate cement has relatively high concrete strength, with no significant corrosion in civil engineering buildings, and the member bearing capacity is in accordance with design requirements. Basic magnesium sulfate cement is one of important base materials in civil engineering construction, with research and application values.