The present invention provides a measurement method and apparatus of a dynamic capillary pressure curve of an oil reservoir. The method is as below: providing an inlet end at the bottom of the core; providing an outlet end at the top of the core; arranging N oil phase pressure test points on a first side surface, which is one of the two symmetric side surfaces on the core, and arranging N aqueous phase pressure test points on a second side surface; displacing water into the core through a displacement pump; scanning a core fracture surface by a CT scanning device by to obtain oil saturation; testing the N oil phase pressure test points and N aqueous phase pressure test points by an oil phase pressure sensor and an aqueous phase pressure sensor; calculating dynamic capillary force based on the measured N oil phase pressures and N aqueous phase pressures; and changing the displacement speed and performing several tests to determine a plurality of dynamic capillary pressure curves with oil saturation as the horizontal ordinate and the dynamic capillary force as the longitudinal coordinate and corresponding to different preset displacement speeds. The present invention can effectively detect dynamic capillary pressure curve of the oil reservoir, so as to accurately obtain the reservoir characteristics.