Background: Self-compacting concrete that has good working property is the prerequisite of steel-concrete structure.The early age mechanical property of self-compacting concrete is the important parameter when design steel-concrete structure.Purpose: This paper attempts to research the working property and early age mechanical property of self-compacting concrete.Methods: Test is used to research the working property and early age mechanical property of self-compacting concrete.Results: Self-compacting concrete that could meet the requirement of steel-concrete structure has been mixed and parameters of early age mechanical property of self-compacting concrete which is necessary for design of steel-concrete structure have been presented.Conclusions: Base on the results

this paper can guide the construction of self-compacting concrete in steel-concrete structure and the design and construction of steel-concrete structure.