A point cloud fusion method includes: acquiring a to-be-fused point cloud; determining a target deformation field corresponding to the to-be-fused point cloud; adjusting a current observation point cloud to obtain a first observation point cloud; adjusting the to-be-fused point cloud to obtain a first to-be-fused point cloud; copying first to-be-fused points in the first to-be-fused point cloud to obtain a copy point cloud corresponding to the first to-be-fused point cloud; updating the copy point cloud and the first observation point cloud to obtain an updated copy point cloud and an updated first observation point cloud; and fusing the updated first observation point cloud and the updated copy point cloud to enable the updated copy point cloud and the updated first observation point cloud to be located at an updated zero isosurface.