Content generator publish a large number of articles make cloudflare effect is not good, what should

  Publish a large number of articles will increase the burden of cloudflare, or even lose the effect, should I create a new wordpress on siteground for subdomain abc? and dedicated to publish articles with it, and ensure the performance of cloudflare.

Anytime you make a change to your website, which includes posting articles, you need to purge cloudflare cache.