Abstract: Recently, digital computers are gradually used to replace analog or hybrid computations for implement of continuous-system simulations. Digital continuons-system simulation has significant advantages: better man-machine interaction, higher accuracy and reproducibility, more convenient programming and report generation, etc. The simulation user would like to have a more convenient and flexible simulation language, in order to be as free as possible from the! details of computer programming and concentrate on his system simulations. An equation-oriented BASIC simulation language which permits the user to enter first-order differential equations in essentially unchanged mathematical form is introduced in this paper. It may run on any machine which supports BASIC. The user does not even have to be familiar with BASIC so long as he follows the simple format specified. A computing example is given to illustrate its application.