A nearly complete sacrum consisting of six vertebrae was recovered from the quarry, originally only lacking some ribs. The original description of "Huabeisaurus" suggested that only five sacral vertebrae were present based on the number of sacral ribs and intercostal foramina. The sacrum is currently heavily restored with plaster, but pre-restoration photographs show the sacrum in two oblique dorsal views and right lateral view. These photographs reveal that the last dorsal vertebra was taphonomically shifted posteriorly and to the right, crushing the right first sacral rib. Pre-restoration photographs and the number of broken sacral neural spines currently visible indicate that the sacrum was composed of at least six vertebrae. The first vertebra crushed into the sacrum could represent a seventh sacral vertebra; because the ribs of this dorsal vertebra are not observable firsthand or in photographs, but it cannot be verified whether or not these ribs contacted the ilium. The vertebra was interpreted as the last dorsal vertebra because: its neural spine does not appear to be fused to the neural spine posterior to it, and the usual sacral vertebral count for all but the most basal somphospondylans is six (with seven vertebrae in "Neuquensaurus" as the only derived exception).