Micropore detecting device and rotating detecting device

The invention discloses a micropore detecting device and a rotating detecting device. The micropore detecting device comprises detecting needles, detecting needle protection mechanisms, weights, movable supports and optical fibers. Each detecting needle protection mechanism comprises a fixed sleeve and a sliding sleeve. The detecting needles penetrate through the sliding sleeves and the fixed sleeves. The movable supports drive the sliding sleeves to move up and down. The weights are fixed to the detecting needles and are pressed on the sliding sleeves, the weights can move up and down along with the sliding sleeves, and the detecting needles can move downwards through the weights. When the movable supports drive the sliding sleeves to move downwards in the fixed sleeves, the detecting needles located in the fixed sleeves move downwards to penetrate through holes of workpieces to be detected. When the movable supports move upwards, the sliding sleeves move upwards in the fixed sleeves and eject the weights upwards so that the detecting needles can be drawn out of the workpieces to be detected. The optical fibers are fixed to the movable supports and used for inducting whether the detecting needles move upwards or not, and therefore whether the detecting needles penetrate through the inner holes of the workpieces to be detected or not can be judged. The rotating detecting system comprises the micropore detecting device used for detecting the inner holes of the workpieces.