The invention discloses an oil tank truck cleaning treatment system and technology. The system comprises a boiler device, a cleaning device, an oil vapor trap device, a waste gas treatment device, a waste heat recycling device and a sewage treatment device. The boiler device is connected with the cleaning device, the oil vapor trap device is located in the middle of a spraying tower of the waste gas treatment deice, one part of waste liquid of the spraying tower is returned into the spraying tower through a circulation pump, the rest enters the sewage treatment device, and unabsorbed oil vaporenters the boiler deice through the top of the oil vapor trap device for secondary air combustion. The low-pressure vapor tank technology most advanced in China is adopted, the cleaning quality is ensured, scale cleaning is achieved, more than 200 oil tank trucks are treated daily, the efficiency can be greatly improved compared with retail investor extensive type cleaning, consumption of low-pressure steam amount of each truck is reduced by 55% or more, cleaning sewage is recycled after being treated, the cleaning cost of each truck is reduced, and economic benefits are improved. Waste gas is exhausted after being treated and reaching standards, no pollution is caused to surrounding, and great environmental and social benefits are produced.