Application the data of the digital seismic network in HeilongjiangProvince. Through re-position of all the clear and reliable blasting that has positioned near the Suileng quarry which in the 2002 ~ 2006 station network directory . Contrast GPS measured location, to study the digital seismic network in Heilongjiang Province  data-processing software system (MSDP Human-Computer Interaction System) provides five kinds of positioning procedure, the preliminary view that for the net shallow earthquake location simplex method is superior to other methods.