everytime I open the drawing the zoom factor it became 12 again i turn it 70
my question is theres any setting to become default the settings about the zoom factor?

The value for the ZOOMFACTOR system variable is stored in the Windows Registry.  Normally, once you set it, it should not reset itself unless this is being caused by a poorly written lisp routine.  Are you using any custom lisp routines?One way to set it and forget it would be to specify the setting in your acaddoc.lsp file.