The history and present situating of the cone penetration test （CPT） in China are introduced. Using different theories related to CPT the main factors affecting the penetration capability, and the dimitations and complexity of CPT in practice are analyzed. Meanwhile a new way is put forward to improve the capability of penetration, in order to solve the problems the CPT met in hard loess, frozen earth and soft rock areas in west part of China. By means of the lab test we take effort to establish the relationship of the parameters of the soils with the measured data from gyration penetration process.