在国外的论坛逛了下，终于扒到一个能打开多个tab的小巧的pdf阅读器啦
Recently came across qpdfview and seems like it is the best tabbed pdf reader out there right now.

You can install it using the following commands.

sudo apt-add-repository ppa:b-eltzner/qpdfview
sudo apt-get update
sudo apt-get install qpdfview

引用地址：http://superuser.com/questions/167920/ubuntu-is-there-a-good-tabbed-pdf-viewer

这个要支持一下。。。。。。

不错，有前途。