Mary Susan Torley, 60, from Workington, was found guilty by West Allerdale magistrates, of assaulting a resident in her care in October.
The 54-year-old resident with onset dementia was dragged by her clothing against her will causing her to fall.
Torley was sentenced to a monitored curfew for 12 weeks, Â£620 costs and a Â£60 victim surcharge.
She cared for three vulnerable adults at a private care facility, which has since closed, on Windmill Close in Cockermouth.
A co-worker in the home witnessed the incident and reported it to Cumbria Police.
A private care home worker who assaulted a vulnerable resident with Down's Syndrome has been sentenced.