Based on the simplified circulation model of the tropical cyclone, a qualitative analysis is made of the approximate analytical solution to the partial differential equation describing the tropical cyclonic disturbance. The evolution Characteristics of the tropical cyclone and the effects of the heat field distribution, the water vapour at the boundary layer and the initial wind field on the developing disturbance are discussed in detail. The analysis provides a theoretical ground for studying the development of the tropical Cyclonic disturbance.