Accelerated corrosion test on 135 deformed and plain reinforcement bars embedded in 45 concrete specimens was performed. Subsequently, the image of spatial corrosion profiles and characteristic parameters of reinforcement bar were determined based on the invented test device for image of spatial corrosion profiles of reinforcement bar and the computation method for spatial corrosion characteristic parameters. Finally, the correlation between mass loss ratio and other spatial corrosion characteristic parameters including the maximum corrosion depth, the minimum residual cross sectional area, the maximum cross sectional loss ratio and pitting corrosion factors was quantitatively investigated, which provides a basis to describe the spatial corrosion profile of reinforcement bar in concrete. Analysis results show that the maximum corrosion depth and the maximum cross sectional loss ratio increase linearly with the increase of mass loss, while theminimum residual cross sectional area and the area pitting corrosion factor decrease linearly with the increase of mass loss ratio; theminimum residual cross sectional area decreases linearly with the increase of the maximum corrosion depth; furthermore, degree of non uniform corrosion of the ribbed bar is more serious than that of the plain bar; moreover, the correlation between the mass loss ratio and the area pitting corrosion factor is higher than that with the depth pitting corrosion factor.