在英文wiki(日语看不懂)上找到解决办法了。。。这个确实是个bug,原文"This zone has a bug in that when you defeat the undead drake its corpse will block your path, do a jumping attack (analog forward + heavy attack) to dislodge the corpse from the ground and proceed.”用跳斩可以把尸体砍的两腿支起来,可以从裆中过去。。只剩下下半身了。。。巨奇葩的景象。。。