简要分析利用多台P波到时在两种条件下（已知区域和未知区域P波速度）采用搜寻法（又称网格法）估测震中位置的算法，通过基于COM组件的VB与Matlab混合编程途径，实现已知区域P波速度条件下利用多台P波到时估测震中位置算法程序化，实际使用中发现，该程序具有运行界面友好、速度快及对网内和网缘地震定位精度较好的优点，为利用多台数据测算震中位置的又一辅助手段。

：In the first,We briefly analyzes the algorithm of using multi station P- wave arriavl time under two cond-

itions (regional P-wave velocity is known & unknown), using search method (also known as grid method) to estimate the epi-

center . COM components based  VB and Matlab mixed programming to achieve the algorithm of estimate the epicenter by t-

he regional  P-wave velocity is known. In actual use,we found that the program had Advantage of run friendly interface、 fa-

stly、accurately earthquake location,which earthquake happened in and in edge of the net. Added an auxiliary means to esti-

mate the epicenter by use of multi station data .