Abstract: Simulation of electrostatic field with a steady current field is a very classic general physics experiment.

In the traditional physics experiment，the experimental data was generally recorded by an equal arm recording method，

and then the inner cylinder radius and the outer ring inner radius were obtained according to the linear relationship

between the equipotential voltage and the logarithm of the equipotential circle radius. According to the characteristics

of the experimental data，the exponential fitting method，the binary linear regression method and the A-type

uncertainty method are simultaneously sued to process of the experimental data obtained by simulating the electrostatic

field with the steady current field. The static current field is simulated and error analysis of field experiments is given.

Through comparison，the application and analysis of data processing methods in experiments are carried out.

Key words: steady current field, electrostatic field, data processing