An electrical performance detection instrument was designed based on virtual instrument to achieve the quantification detection of a certain ammunition. The hardware of the detection instrument adopts modular design and the software is realized by graphic program language Lab VIEW. The DC operating voltage and control command are input to the electronic components of the ammunition. The current consumption and control voltage are acquired at the same time. The quantification detection for circuit integrity of the electronic components of the ammunition is accomplished. The test result indicates that the detection instrument can meet the army ammunition quality monitoring and maintenance organization to carry through the electrical performance testing for the ammunition.