The utility model discloses a quantitative and qualitative integrated detection device for a screw vehicle testing fixture. The detection device is characterized in that the detection device comprises a detection support, a detection pin, a lineation pin, a limit bushing, a handle ball and a sliding shaft; the upper portion of the detection support is provided with a through hole; the limit bushing is disposed in the through hole; the tubular lineation pin is disposed in the limit bushing in a sliding manner; a lineation needle is arranged at the front end of the lineation pin; a lineation pin flange is arranged at the position close to the front end of the lineation pin; the detection pin is arranged in the hole of the lineation pin in a sliding manner; the handle ball is connected to the rear end of the detection pin; and a limit mechanism is arranged between the detection pin and the lineation pin. The beneficial effects of the detection device are that a detection structure and a lineation structure can be integrated in practical applications; two operation conditions (quantitative detection and qualitative detection) can be carried out independently; the detection device is convenient to install and debug, and has simple structure and small size; the operation is reliable; and parts are not liable to lose.