The basic characteristics of time difference method for ultrasonic pipe flow measurement are studied.Flow measurement in ultrasonic pipe and ideal ultrasonic frequency in leak detection status is comprehensively analyzed. The appropriate ultrasonic sensor equipment is selected. The accurate time difference measurement of pipe flow is realized by using MAX35104 high-precision timing chip

STM32 F103 microcontroller unit（ MCU） chip is used to achieve the overall control of the system. Through the analysis and processing of the entire system

a reasonable system hardware integration integrated circuit（ IC） is designed. The measurement system has a small size

low power consumption

and high precision. After the late-stage equipment commissioning work

the feasibility of this ultrasonic pipeline gas flow measurement and leak detection technology is demonstrated.