my question is about seo,please any one tell me about blocking or hiding subdomains so google can not crawl the links of subdoamins

You can right the code at robots.txt disallow functions.

Use Apache rewrite logic to serve a different robots.txt on the development domain:

<IfModule mod_rewrite.c>
RewriteEngine on
# Redirect non-www to wwww
RewriteCond %{HTTP_HOST} !^www\blahblah.adc [NC]
RewriteRule ^(.*)$ http://www.blahblah.adc/$1 [R=301,L]
</IfModule>

And then create a separate robots-dev.txt:

User-agent: *
Disallow: /

This will block subdomains.

Use Apache rewrite logic to serve a different robots.txt on the development domain:

<IfModule mod_rewrite.c>
RewriteEngine on
# Redirect non-www to wwww
RewriteCond %{HTTP_HOST} !^www\blahblah.adc [NC]
RewriteRule ^(.*)$ http://www.blahblah.adc/$1 [R=301,L]
</IfModule>

And then create a separate robots-dev.txt:

User-agent: *
Disallow: /

This will block subdomains.

is it working? am also want to hide sub domains from google on my website.