Migration time created of node I'm flowing article to migration my data. Every fields is working fine. But field created doesn't working. Field created always insert time import. 

I try replace field created with setting 

created:
  plugin: default_value
  default_value: 1389312000


but same result. So how to migration time created of node?
Most likely your source plugin isn't supplying the created field to do what is done in the reference article:


source:
  plugin: custom_article
destination:
  plugin: entity:node
  bundle: article
process:
  ...
  created: created


This part of the source plugin config is saying, "import article nodes by setting its created field from the source column created generated by the custom_article plugin". 

Adding: 

created:
  plugin: default_value
  default_value: 1389312000


Is telling the migration to "set created to 1389312000 as a default (if there's no source plugin data"

If you're copying the reference article's modules/migrate_custom/src/Plugin/migrate/source/Article.php, you'll need to make sure your plugin's query() method is correctly querying its source so that's available for processing and 

process:
  ...
  created: created


Is set in your migration config so that it's sourced correctly.