Abstract: With dedp study of the crude oil rheological properties and wide use of the rotating viscometer, a great quantity of rheological data need processing and inducing. Here is a new method presented in the arcticle. The BASIC programme made out is applicable in 7 modes making regression and analysis of the shearing rate, stress and test Value of various Newtonian and non-Newtonian fluid oil. Results are shown obtained by application of this programme in loop experiement.