Abstract:The Hefei basin puts allkinds of complex to-pography together such as mountains,hills,plains,mashes and network of rivers etc.;Lower Velocity Layer (LVL) has rapid changes both in thickness and velocity; bed-dips are variable;weak reflection from interface and strong noise interference made data poor signal-to-noise ratio. We adopted the following measures in seismic field operation in Hefei basin in view of the surface condition:designing of geometry with high folds,long offset and small group interval;using satellite photo and in combination with geologic outcrop investigation data for reasonable selection of shooting and receiving conditions and adjustmentof geometry in time;adopting the chargewith high-explosive-speed to shot etc. The resulted data has obvious improvement in comparison with legacv data and ideal effects.