The provincial police commandment in a statement said the cache was discovered during an operation conducted in Syedabad district.
The statement further added that the cache includes several types of weapons and heavy ammunition including artillery rounds.
The provincial police chief Gen. Fahim Qayem said the militants were looking to use the weapons to carry out a series of attacks in Wardak province.
However, he said the Afghan security forces managed to thwart their attack plans by seizing the cache where heavy weapons were stored for the attacks.
The anti-government armed militant groups including the Taliban insurgents have not commented regarding the report so far.
Maidan Wardak is among the relatively volatile provinces in central parts of the country, located close to capital Kabul.
The anti-government armed militants are actively operating in its various districts and often carry out insurgency activities, mainly in the districts lying along the highway connecting Kabul with the southeastern and southern provinces.