In order to meet the high-density and multi-model task demand of space instrumentation and command software, and to solve the software development problems caused by the complexity and the scale of software, a new software reuse technology applied in the experiment information analysis software (EIAS) is proposed. The new software reuse combines the object-oriented technology with the database technology by mechanism of similar virtual machine, and maps the configuration of independent analysis items, analysis steps, field-processing methods and frame-processing methods in the database to final software components to realize the reuse in experiment information analysis software. The result shows that the new software reuse helps to speed up progress of software development and to improve the software reliability and maintainability.