Abstract: Active faults is very important to the influence of the engineering construction,especially the holocene active fault,can cause soil liquefaction,land subsidence,ground cracks and other secondary disasters.To reduce its influence on the construction site,how to detect active faults is the key of the engineering construction in unknown circumstances.The means and measures taken by is an important factor to find out the active faults of the accuracy of the assessment of active faults.This project area to take data collection,field investigation,integrated physical exploration and engineering geological prospecting and other means to carry on the comprehensive analysis to the position of the active faults,rock cover thickness and degree of rock weathering,provide reliable basis to find out the active faults.