[en] The Matlab language is used to integrate the equilibrium fitting code (EFIT), which simplifies the code's procedure and adds the analysis function to the results. In the calculation of equilibrium reconstruction, the improved EFIT code is used to get the pressure of plasmas, internal magnetic surface and plasma current density profile. In addition, the results of the calculation are compared with the experiment data from the X-ray. The results show that the improved EFIT code can meet the basic requirements to the equilibrium reconstruction calculation, and it can provide important reference data for the operation and control of the J-TEXT tokamak discharges. (authors)