The digital graphic automobile instrument includes processor, memory, parameter acquiring module, displaying and driving module, display panel and functional modules stored in the memory. The functional modules include parameter sampling program module, graph displaying program module, graph data module, and control program module. By means of computerized digital graph processing technology and embedded computer software technology, the present invention displays and records parameters graphically on automobile display panel, and realizes hardware function with software. The present invention has the features of rich display colors, high display precision, high reliability, etc. and can show speed, mileage, engine rotation speed, water temperature, oil amount and other parameters in the panel.