The operator of asphalt mixing plant for sale should accumulate a lot of experience to predict most of the mechanical failure, early solution to eliminate hidden dangers. If the failure appears, should be able to accurately determine and timely elimination, ensure the normal use of machinery. In addition, besides proficient in equipment, the operator should also have product quality control knowledge. That is familiar with asphalt mixture temperature, whetstone ratio, gradation, etc, and can be skilled to technical judgments of the mixture, timely analysis and solve the problems of the mixture.