The utility model discloses a quick positioning structure, including the top post, the top post sets up one side at spring upper board, the other side of spring upper board is linked with the one end of straight line guide pillar, the other end of straight line guide pillar is in proper order through spring, guide pillar cover, spring lower board and straight line bearing and is linked with guide pillar connecting plate, the guide pillar cover is connected on spring lower board through
fastener, the spring is established on the straight line guide pillar between spring upper board and guide pillar cover, straight line bearing is connected on spring lower board through
fastener. The quick positioning structure in the utility model can realize the accurate quick positioning of pneumatic scissors and plastic part gate, avoids the problems of too deep, too high etc. in the process of shearing of gate, satisfies the product quality requirement.