The utility model relates to a performance index detection device for a handheld vehicle-mounted computer and a global positioning receiver. The performance index detection device comprises a casing,a panel and a circuit module, wherein, the circuit module is installed inside the casing, a battery charger is installed at the lower part on the back of the casing, a detection interface, a USB (universal serial bus) interface and an antenna interface are sequentially installed on the back side at the top of the casing from the left to the right, so as to form a whole body together with the panelon an enclosing cover at the port on the front side of the casing through combination. The structure of a nest plate set INTELPXA270 is taken as a platform, an embedded microprocessor and a large scale integrated circuit module in low power consumption are adopted, and a software control technology is combined with the practical testing requirements that are supported by the software control technology, so that the high optimal design can be carried out; the performance index detection device is operated through a liquid crystal display touch panel and runs based on a self power supply, so that the performance index detection device can detect various performance indexes of detected equipment in real time and also perform the data administration and equipment maintenance by connecting corresponding interfaces and starting up a self testing program; and in addition, the performance index detection device integrates the functions of a plurality of general measurement methods and dedicated testing interfaces, and has the advantages of reasonable design, simple and convenient operation, high precision and low power consumption.