The invention discloses a three-dimensional pressure field modeling method based on geological mass tracking, and the method comprises the steps: 1, building single-well two-dimensional stratum pressure curves according to logging data; 2, building stratum pressure curve surfaces through all logging two-dimensional stratum pressure curves; 3, carrying out the interpolation of stratum pressure curve surfaces; 4, constructing a stratum pressure frame model through the stratum pressure curve surfaces; 5, recognizing a three-dimensional pressure closed block in the stratum pressure frame model; 6,carrying out the pressure feature assignment of the recognized three-dimensional pressure closed block, and building a three-dimensional pressure field model. According to the invention, the whole process is efficient in algorithm, the change trend of a pressure field is accurate, and the more beneficial data support is provided for the building of a petroleum entrapment mode.