I mean, For example , I say the salwat of the rukuh and I do mistake.
Or for example I do mistake when I say the sunnat Allahu Akbar of my namaz .

Do I have to repeat my namaz? Or its ok because its in the sunnat zikr of my namaz , so if I make mistake its not a problem?

You can do sajdata al-sahw for mistakes in your recitation but if you correct the recitation while in salat there is no need to make sajdata al-sahw.