Abstract: Taking IKONOS as examples,by analyzing the shortages of five traditional kinds of fusion methods and the unique characteristic of vegetation on fusion quality,a fusion model,considering these influences by combining fusion methods based on transformation and those based on filtering,was proposed to improve fusion quality.Then,three key factors for fusion quality were concluded and improved methods were introduced.The comparisons were carried out on real image among different improving methods.The results show that the methods based combining fusion model always outperform the traditional ones,and that the most practical method with the best fusion quality is the method,which adopts the new strategies including vegetation-separated with fix-threshold on improved vegetation index,improved transformation fusion method and improved filtering fusion method.