The utility model provides a problem that intelligent key for automobile, the current intelligent key for automobile key of main solution inserts not hard uply. It includes mechanical key, key cover, key case, and electronic component is arranged in the key case, key cover and key case form the chamber that holds of placement machine tool key, hold the stop gear who is equipped with the mechanical key of restriction in the chamber and removes, stop gear include with the screens piece of machinery draw -in groove looks adaptation on the key with withstand the elastic component of screens piece, be equipped with the operating portion on the screens piece, the last handle hole that supplies the operating portion to expose that is equipped with of key cover, the screens piece has primary importance and the compressible elastic piece who is arranged in the draw -in groove and leaves the second place that the draw -in groove made mechanical key take out. Its advantage can prevent effectively at simple structure that male machinery key is not hard up.