Share nodes to Slack i want to share link of post in social media i find module addtoAny and module social media for sharing poste butI didn't find to share post to slack.

Any help?
There are two modules, I didn't try them myself and I'm not sure what is your use case:
Drupal to Slack and Slack. Are these provide the functionality you want?

Update
Ok, there are other modules for adding share buttons like Simple Addthis or the dev version of the original Addthis Module