The invention relates to the field of curved planar reconstruction, in particular to a curved planar reconstruction method for cardiac scattered-point cloud data. The curved planar reconstruction method for cardiac scattered-point cloud data includes the steps of firstly, defining the data representation form of acquired point cloud data, establishing octree topological relation, and defining a space function; secondly, establishing a vector field, selecting local adjacent planes, and determining vertex normal vectors according to an average of planar normal vectors of the local adjacent planes; thirdly, uniformizing the vertex normal vectors; and fourthly, solving a Poisson equation, extracting a contour surface by MC (marching cubes) algorithm according to an indicator function and gradient thereof, and reconstructing a cardiac three-dimensional surface model. By the curved planar reconstruction method for cardiac scattered-point cloud data, cardiac spatial position relation can be displayed visually and accurately, optional display, zooming, rotation and cutting in three dimensions can be achieved, cardiac diseases can be detected, computer diagnostic analysis for diseases such as arrhythmia and surgical accurate simulation are achieved, and safety and reliability in disease diagnosis are improved.