Abstract: The space distributions,activities,causes and mechanisms of the tectonic ground fissures are discussed.It is believed that the geological faults is the internal cause of the ground fissure hazard and the over-withdraw underground resources is the external cause. For the tectonic ground fissures probing,the seismic exploration is practicable with suitable survey system, appropriate parameters and right data processing, and it may successfully give the tectonic parameters of the ground fissures in the profile from dozen to several hundred meters depth and the their locations on the ground surface.