"Mr Walker's actions threatened the very fabric of New Zealand racing and the strong penalty applied by the JCA [Judicial Control Authority] panel sends a signal that the industry holds the integrity of racing at the highest priority," Racing Integrity Unit general manager Mike Godber said.
"The message is clear, serious breaches such as this case will have severe consequences for those involved.
"The Walker case serves to illustrate the effectiveness of the RIU's systems of surveillance of racing and betting and its investigation processes." Walker pleaded guilty to two charges of having bet on a rival horse in a race he was riding in and elected to defend two charges of not allowing the horses he rode to finish in the best possible position.
He was found not guilty on one of those charges, but guilty on the other.
In his defence, Walker claimed his cheating was influenced by his desire to feed his family.
Jockeys' earnings are declared on the NZ Thoroughbred website on a weekly basis.
Last season, to the end of the 2013-14 season, Walker earned $89,322 and that did not include scratching fees, or trials rides. His total income was over $100,000.