[en] The TRIMA program set aimed for calculation and analysis of two-dimensional magnetostatic fields of the cyclotron type accelerators is described. The set includes three main programs: AXMA2, AXTRI1 and TRIMA and the PICTV3 and CALE programs for data processing. The method of nonlinear elliptical type differential equations is used for the calculations. The programs are written in the FORTRAN language and adopted for the BESM-6 computer. The conclusion is made that application of the given programs permits to analyse the effects of magnetic system different parameters on the magnetic field value and configuration. This gives the opportunity to decrease appreciably the volume of experimental works on simulation of magnetic fields in accelerators