It is a popular positioning method to use blast sound for positioning.Therefore,an array blast sound positioning system is proposed and improves the array blast sound acquisition circuit used,including large dynamic sound processing module,multi-range signal comparison module,data processing module,etc.Multisim simulation verifies the function of the array type blast point sound acquisition circuit,in which the large dynamic sound amplification circuit can amplify the sound signal at a high magnification,amplify the acquired small signal into a processable sound signal,and the multi-range signal comparison module uses a multi-threshold structure for processing,comparing and outputting the logical signal with sound information.Then connect the microcontroller STM32 to the upper computer for data transmission,and use MATLAB for data analysis and positioning to achieve preliminary positioning of the explosion point position.