Remote sensing image can reflect distribution rules and structural features of active faults exhibition space from the macro. Based on regional geological study, the authors used data preprocessing, information enhancement and data fusion to improve the degree of clarity and interpretation of remote sensing images. The interpretation keys of the fault zone were established based on the spectral characteristics and geometric flag of the remote sensing images, and the interpretation of the faults and their activities was carried out. Combined with field investigation, the macro analysis and segmentation activity study of Macheng ―Tuanfeng fault were carried out. The results show that Macheng - Tuanfeng fault zone can be divided into northern, middle and southern sections according to the intensity of the control force. The linear characteristics of the northern section are apparent in the image, and the interpretation key of the fault is remarkable. The fracture control force of the middle section is weak, whereas the linear characteristics of the image are fuzzy. The southern section is a buried fault. Remote sensing technology plays a very important role in the survey of the activity of Macheng―Tuanfeng fault zone; the application of high resolution remote sensing imagery and remote sensing image processing technology, in particular, can not only speed up the progress of the investigation but also provide guiding information for the field survey, so as to improve the survey efficiency and accuracy.
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