Abstract: Blasting crater experiment is an efficient method to obtain blasting parameters.It is also an important basis of blasting design and operation.After developing for many years，C.W.Livingston law for blasting crater is a general guideline of blasting crater experiments.It is usually to drilling some vertical blasting holes in the level ground when blasting crater experiments are conducted.Then，the blasting crater experiments can be done with designing parameters.But the classical blasting crater experiments can not be carried out in underground blasting such as horizontal hole，up hole and Vertical Crater Retreat blasting，except for bench blasting.The blasting mentioned above are usually used in underground mines and tunnels.In order to provide functional blasting crater experimental methods for underground blasting，the basic principle of it was studied.Beyond，the types，procedure，measurement and analysis methods of underground blasting crater were also offered.The methods are beneficial for underground blasting.