The prefabricated external prestressed concrete wind tower with split and variable diameters keeps its integrity by its own gravity and friction before the steel strand is stretched. There is no previous research about the influence of the stressing order on the stress state of the tower. A layered-shell element model is built to simulate the unstressed state and the stressing process. Construction procedure is developed according to those results. Vibrational chord strain gauges are adopted for monitoring the strain of key positions during the stressing process. It is found that the results produced by layered-shell element model arecompatible with those from the field test and it is suitable for construction process analysis of the prefabricated tower. The stability of the structure during the stressing process proves the validity of the construction procedure,which can provide a reference for similar projects.