Hello,Thank for your reply.
I tried the way you provide, but the problem still exists.
Here is my file's screenshot.
https://imgur.com/veBa11L
I already turned the "Remember Roots Positions" in GuidesFromHair and HairFromGuides on.
I tried a new scenes, and created a sphere for testing, and it tooks like this.
https://imgur.com/4KbX4FL
ps. It's same carmer view, but FurBall just expolde
The version is V1 Demo 1.3.4.13734.
I tried Maya 2018 and 2017, Both have the same problem.
Maybe it is a bug from demo version? Using the official version doesn't seem to be problematic.
Thanks for your help!