Disclosed are a keying structure and a keyboard applying same. The keying structure includes a switch button, a heavy load spring, a switch shell, a striking pillar, a light load spring and a thin film circuit, wherein the switch button is clamped at the upper end of the switch shell, the heavy load spring is arranged underneath the switch button, the striking pillar is arranged within the switch shell, and the striking pillar is arranged under the heavy load spring, the light load spring is arranged underneath the striking pillar and the thin film circuit is arranged underneath the light load spring. During use, the switch button is pressed with a hand and, depressed under pressure, transfers a down force to the heavy load spring; the heavy load spring transfers the down force to the striking pillar, and the striking pillar depresses the light load spring to make the lower part of the striking pillar contact with the thin film circuit, thus making the thin film circuit conduct. The sensitivity of the present invention is high, the invention also has a downward idle motion, improving the feel to the hand for the player, and is low in cost.