Using the high-resolution shallow seismic reflection, a buried fault in the site of thermal power plant in Fujian province is explored. The result reveal that the fault exists clearly with strike of N40-50°E. It is a normal fault with about 2-4 m throw, and its two breakpoints are buried in 11 m and 31 m depth. The shallow seismic exploration and geological interpretation offer dependable basis for engineering avoidance