The solid state nuclear track detectors（SSNTDs） are used very extensive in the radiation research and radiation protection dosimetry in many domains.As the necessary member of that

CR-39 detectors have been popular between scientific research workers preference in recent years.This paper briefly introduces and compares with several commonly used neutron solid state nuclear track detector

and introduces the CR-39 detectors and its etching methods emphatically and summarizes the main factors that effect the etching rate of the CR-39 neutron detectors

this paper expounds the importance of etching technology for CR-39 detectors and prospects its application in other fields.