Earthquake three-dimensional observation system imaging grid design method, device and medium

The invention provides an earthquake three-dimensional observation system imaging grid design method comprising the following steps: obtaining geological conditions of an exploration work area, and determining the dominant frequency and propagation speed of earthquake wavelets according to the geological conditions; and calculating a first parameter according to the dominant frequency of the seismic wavelet, and calculating the grid size of seismic imaging according to the propagation velocity and the first parameter. The invention further provides computer equipment and a computer readable storage medium. According to the method, on the basis of the wavelength relation of longitudinal and transverse waves of seismic wavelets in stratums with different speeds, seismic pre-stack migration non-aliasing sampling is ensured by using the sampling theorem, the requirement of migration imaging on imaging grids is met in the design stage of an acquisition observation system, and then the imaging precision of seismic