Corruption complaints against Queensland Police have increased.

Queensland's Crime and Corruption Commission (CCC) has issued figures showing 345 allegations of corruption against public sector officials that are now under investigation.

That is nearly half the total 815 cases referred to the watchdog between May and August.

About 70 per cent of those allegations were levelled against Queensland police.

But despite the hundreds flooding in, just 19 cases have been finalised.

The stats show 31 counts of disciplinary action recommended against 10 police officers and another five public sector staff.

The watchdog recently relaxed its requirement for complainants to provide a statutory declaration.

The requirement was introduced by the former LNP government under Campbell Newman, but was scrapped by the Palaszczuk Government earlier this year.

CCC chairman Alan MacSporran said it was not yet known whether that change spurred the rise in complaints.

“We suspect there may at least in part be some explanation from the relaxation of the requirement to lodge a stat dec,” he told reporters.

“Some people who would be put off by the need to lodge a stat dec may never have come forward whereas now they will, quite freely, with the requirement being relaxed.”