The invention discloses a method and device for measuring pressure distribution. A movable rod is arranged in a container filled with liquid to be measured, and the perpendicular line of the center line of the container is used as a rotating shaft to drive the container to rotate at a set angular speed; the distance from the movable rod to the rotating shaft is collected; based on the distance, the initial density of the liquid to be measured and the width and the quality of the movable rod, the pressure of the liquid to be measured caused by inertial centrifugal force is calculated. The device can quantitatively measure pressure distribution inside the rotating liquid. In addition, the method and device are simple in operation, and demonstrative experiments can be vividly performed; the device for measuring pressure distribution can be used as an experimental instrument or basic experimental equipment in the correlation research field.