The thesis commits to develop a type of software applicable for the rapid analyzing and prevention scheduling of static voltage stability in large-scale power system, by bring the application of current voltage stability analyzing method in real system into consideration, reviewing speed and precision requirements for real-time analysis,use the method of anchored on the combination of sensitivity restriction and local curve fitting to detect collapse point rapidly and precisely and the method of grounded on the optimizing of generated power distribution factor to raising system load margin, to researches and develops a set of software serving for online voltage stability rapid analyzing and prevention scheduling. The software is empowered to process an example analysis to the static stability of Hunan Grid, it can meet the speed and accuracy.