Hi

    this is a video of rigging my character in poser2010,It's not finished yet,but I will keep improving it,and will add some expressions to it later。

https://www.youtube.com/watch?v=bmUMY8Yv6M0

Curious to know why you chose a rotation order of XYZ for the foot?

Quote - Curious to know why you chose a rotation order of XYZ for the foot?

In fact all the bone rotation order is xyz, I just want to make them unified,this is the same way I rigged in other softwares，and It seem to work normal.

Attached Link: http://poser.smithmicro.com/tutorials/Characters_rigging.html

That's where you're going wrong.  You'll need to rethink what you think you know about rigging when dealing with Poser. X=twist,y=side-side and z = bend in an XYZ setup. However, if a body part...let's say the foot for example... twists on the z axis naturally, you're not going to want to make your x axis a twist. So for the foot you'd want something closer to ZYX.  We actually have a helpful guide to suggested joint orders:

 

http://poser.smithmicro.com/tutorials/Characters_rigging.html

In Poser it is essential that the first order of rotation be axial to the body part. The order of the other two is less important but it has been suggested that the direction in which the body part bends most should be last. This means that a humanoid figure in the 'T' pose will have a rotation order of YZX or YXZ for the torso and legs whilst the arms will have a rotation order of XYZ or XZY. The foot is possibly a special case since its twisting is done primarily in the lower shin so should be YZX.

As mentioned above there are a number of on line tutorials available. My on screen video tutorials may be found at:-

http://www.philc.net/rigging1.php
http://www.philc.net/joint_parameters_1.php

Hope that helps.

thank you for the helpful guide and tutorials,I will reconsider the joint order.