Traditional methods of Tank Car Volume verification is the use of artificial color liquid plus Tsquare to measure the level of empty high. Traditional manual method of verification being low efficiency, low safety factor, the high cost of human, manual reading error caused a great impact on the measurement accuracy. A high precision and multi channel liquid level measurement system based on LabVIEW is designed. First, through the serial port number and baud rate setting system, and then use DRUCK PTX 1830 level sensor for data collection tanker car level, after filtering and processing complex algorithms, realtime display system and liquid level height curve, so as to achieve highprecision automated verification of Tank car volume purposes. Tank car system level data for data acquisition, arithmetic processing, display, storage, alarm, PC automatically analyzes the data and export EXCLE forms and other functions. By actual laboratory and field test results show that the system is effective and accurate height change of the reaction liquid level measurement accuracy of ± 1 ‰, it has some promotional value.