LS-SSDDv1.0 is a Large-Scale SAR Ship Detection Dataset for small ship detection under large-scale backgrounds. It contains 15 large-scale SAR images with ground truths labeled by SAR experts, using Automatic Identification System (AIS) and Google Earth as references. The large-scale images are divided into 9,000 sub-images for network training convenience, facilitating subsequent detection result presentation in large-scale SAR images.