Is it possible to work while on pwd?
It’s run by the provinces so each has different rules. In BC a single person can earn about $16k a year. Anything above that is deducted from the PWD payments. Check your province’s website for the details where you live.
would I be cut off if I tried to go back to work ?
Not cut off. Once you earn more than the maximum amount they start deducting your earnings from the PWD payments.