One of the officers was punched and knocked back.
At that point, a Taser was used.
The IPCA report found that the first Tasering was justified, as the man was warned a Taser would be used if he did not get on the ground, and he failed to comply.
The man was then Tasered again, as the officers believed he could still cause harm.
However, the IPCA found the second use was disproportionate.
Acting Canterbury District Commander Superintendent Lane Todd said the man received appropriate medical attention after he was arrested.
"Our officers face volatile situations every day, which require quick assessment of the most appropriate tactical options, and this was no different.
"The officers involved have been spoken to and reminded of appropriate Taser policy and decision-making."