Recursion is one of the most important basic principles in computer science[1].But it has become a natural enemy of parallel processing since the parallel system was born. Based on cutting with real changing order points[2

3]

cutting with equal length and refined cutting[3]

the paper introduces the concepts of function weight and segment cutting

simulates the relationship between whole course tracing[4] and segment tracing[5] and derives the result that cutting a shorter segment will reveal the law of whole course

so as to destroy recursion limits thoroughly and display the maxium benefits of parallel processing by means of multi-processors or vector processors.