The invention provides a shock device for seismic exploration in a shallow sea area. The shock device comprises a casing, wherein an outer edge of the casing is provided with multiple steam turbines, the position of the casing in a horizontal direction in water is maintained through controlling operation states of the steam turbines, the casing is internally provided with an air bin and a water storage bin, and the air bin and the water storage bin are internally provided with an adjusting mechanism used for changing the volume or water storage amount to change the position of the casing in the vertical direction. The invention further provides a shock method for seismic exploration in the shallow sea area. The device is advantaged in that control on an air gun port gap and air gun excitation energy is realized, through remote control to set the air gun port direction, the air gun port gap and the emission energy, excitation of seismic waves having different energies and frequencies can be realized, through combined detection on different seismic sources, positioning of geological interfaces having different depths can be realized.