Abstract: Three tropical cyclone-like vortices (TCLV) are constructed following the empirical formulas. The asymmetrical thermal perturbations are imposed at the radius of maximum wind of those vortices. The evolution of such perturbations described by disturbed potential temperature, vertical speed and potential vorticity is simulated using Three-Dimensional Vortex Perturbation Analyzer and Simulator (3DVPAS), then the hydrostatic adjustment, the thermal and momentum fluxes, and the energy transformation are analyzed. The results show that the evolution of asymmetric thermal perturbations in three TCLV underwent three main stages, i.e. hydrostatic adjustment, quasi-hydrostatic balance, and growing (for unstable vortex) or decaying (for stable vortex) stages. At the initial non-hydrostatic status, with the dispersion of gravity wave, the perturbation potential energy decreases rapidly, whereas perturbation kinetic energy increases, and the thermal energy and momentum transmit outward. The time taken by the hydrostatic adjustment depends on the stability and intensity of the basic TCLV, and it will take much more time for the stable vortex with less stability to finish such a process. The formation and evolution of spiral band-like structures are shown in the initial two stages, which exhibit a larger radial scale in hydrostatic adjustment stage than quasi-hydrostatic balance stage. It is easier for the outer spiral bands with a longer radial scale and longer lifetime to form in stable vortices, but it is much more difficult for such bands to form and maintain in fast developing unstable vortices. The results in this paper indicate that the formation of distant spiral cloud (rain) bands goes with hydrostatic adjustment in tropical cyclones on the condition of quasi-hydrostatic balance, and spiral bands concentrate inwardly to the inner core of tropical cyclone and finally form the eye-wall and rainbands complex. This research gives a valuable insight into the mechanisms of the formation and evolution of distant spiral rainbands.