Experts, mikrotik reset the queue and interface bandwidth usage after restarting.
is there is a way to keep these data after restarting and clear it manual if i need.

The only thing I can tell you is that in the v6.4 change log it says:

"graphing - make sure that interface graphs gets preserved across reboots;"

You may try...

is there is any another way ?

SNMP + external server
http://forum.mikrotik.com/viewtopic.php ... 54#p281901

Netflow + external server
http://forum.mikrotik.com/viewtopic.php ... 97#p260157

Save stats on router in comment field of queue / interface, would need to be scripted
http://forum.mikrotik.com/viewtopic.php ... 97#p372441

The only thing I can tell you is that in the v6.4 change log it says:

"graphing - make sure that interface graphs gets preserved across reboots;"

You may try...

Has this been confirmed ? Also its just interface or queues too ?