I have issue with commerce_order_load_multiple function
when i use static value of integer in place of uid i am getting result


Logically speaking, that can only mean that $mm-&gt;uid doesn't contain what you think it does.

Install the devel module and use the dpm function to inspect the var:

foreach ($mms as $mm) {
  dpm($mm);
}


That should tell you what's going wrong.