The general equilibrium properties of the spherical torus configuration can be analysed by a simple version of the solution of the Grad–Shafranov equation, i.e. the so-called Solov'ev configuration which involves only four parameters for the magnetic surfaces with both large elongation and triangularity. The safety factor q-profile and the shear -profile can be determined analytically and it is found that both of them increase rapidly near the edge region. It is also noted that the length of the magnetic field line in the favourable curvature part is much greater than that in the unfavourable curvature part near the edge region. There is a substantial magnetic well in this kind of configuration as well. The trapped particle fraction on different magnetic surfaces as a function of relevant parameters is also given.