Concrete pressure testing machine

The utility model discloses a concrete pressure testing machine saves the problem that too much influence detected the precision to dirt piece on the top board, provides following technical scheme, including the support, still be equipped with on the support and be used for detecting on the top board dirt piece weight size with the weigh weight detection device of detected signal of output, weight detection device electric connection has and is used for the comparison to weigh the detected signal being greater than the comparer of weight base mark signal in order to export overweight signal, comparer electric connection has and switches on the downward switching device of action with accessory drive in response to overweight signal, be equipped with the air jet system in order to blow away the dirt piece to gas exhalation on the top board that switches on that is controlled by a switching device on the elevating platform, and then the air jet system begins to the last face of top board jet -propelledly, which