Investigators in Florida say a man accused of downloading child pornography is blaming his cat.

Keith Griffin is charged with 10 counts of possession of child pornography after detectives found more than 1,000 images on his home computer.

According to a sheriff’s report on Friday, Griffin told investigators that his cat jumped on the computer keyboard while he was downloading music. He said he had left the room and found "strange things" on his computer when he returned.

Griffin is being held on $US250,000 ($A297,830) bond in the Martin County jail. It is unclear if he has an lawyer.