Hi.tplink 8980 to stock rom

Hi.i want .openwrt to stock rom.my device is tplink 8980 v1 ....pls help me

Start by reading its device page in the wiki.

Are you talking about the TP-Link TD-W8980? Its device page is missing the procedure for restoring the stock firmware.
Use the device page for the TD-W9980 instead. Its hardware is identical to the TD-W8980.
Note that I have not tried the restore procedure myself.