Medium reverse figure imaging is still an important problem that puzzles the fields such as earth physics

and especially people focus their eyes on the computer velocity

imaging quality and its stability. First

basic principle of bending rays imaging is discussed briefly in the beginning of the paper

then the reverse figure steps are given in detail

mathematical model for reverse figure is designed too. This paper also presents an improved genetic algorithm to settle the reverse figure of bending rays imaging

and its steps are also displayed out. At the end of the paper

an example that gained by improved genetic algorithm is presented

and in order to pop out its advantages

climb hill algorithm is also compared with it. We analyze the difference of the results from their essences and also point out that the large scale collateral calculation and the restriction of crossbreed and aberrance that lead to the velocity and quality. We can conclude the algorithm improves its velocity

quality and stability efficiently by the curve figures of the improved genetic algorithm and climb hill algorithm.