There is a kind of combination of correlated objects in mechanical translation.When match the combination with the rule,the searching solution becomes un-possible by the"combinatorial explosion".A hierarchical intelligence search method is advanced.According to the prior knowledge,the data which do not satisfy the correlation constraint will be removed by the closed-loop eliminate method at first and then only a simple search in order is needed for obtaining the solution of the problem.This method refrains from any backtracking.The time and space consumed by search are greatly reduced.