The uniform colloidal particles of α-Fe2O3 were prepatal by method of phase transition-microwave irradiation in presence of surfactant. It was shown that the aging period isvery shorter than that of conventional method through added CTAB surfactant in microwaveirradiation. In this way the final particles appeared uniform colloidal pseudocube shape andthe productivity of the particles are higher than that of general method. So the industryprospect is good. The influence of microwave irradiation, kind of surf...