Disclosed is a vascular pressure difference correction method, comprising: by taking a proximal boundary point of a first blood vessel (100) and a second blood vessel (200) as a second endpoint and taking a bifurcation ridge point (500) as a first endpoint, acquiring multiple vascular cross-sections between the first endpoint and the second endpoint in the direction of a main axis of the first blood vessel (100)； forming contour lines of the vascular cross-sections on a wall (102) of the first blood vessel and a wall (202) of the second blood vessel； the contour lines, formed on the wall (102) of the first blood vessel, of the vascular cross-sections enclosing multiple first vascular cross-sections； the contour lines, formed on the wall (202) of the second blood vessel, of the vascular cross-sections enclosing multiple second vascular convex surfaces (401, 402, 403)； the first vascular cross-sections and the second vascular convex surfaces (301, 302, 303) intersecting each other to form multiple intersecting lines (601, 602, 603)； fitting the multiple intersecting lines (601, 602, 603) to an intersecting surface (600)； computing and obtaining the area of a cutting plane (700) based on the intersecting surface (600), wherein the cutting plane (700) is a second vascular cross-section passing through the bifurcation ridge point (500) and is perpendicular to a center line (400) of the second blood vessel； and correcting a vascular pressure difference based on the area of the cutting plane (700).L'invention concerne un procédé de correction de différence de pression vasculaire, comprenant les étapes consistant à : en prenant un point limite proximal d'un premier vaisseau sanguin (100) et un second vaisseau sanguin (200) en tant que second point d'extrémité et en prenant un point d'arête de bifurcation (500) en tant que premier point d'extrémité, acquérir de multiples sections transversales vasculaires entre le premier point d'extrémité et le second point d'extrémité dans
