A laser induced breakdown spectrograph, configured for spectral analysis of a substance to be tested, wherein the laser induced breakdown spectrograph comprises: - a laser, configured to emit a high energy pulsed laser; - a spectrograph, configured to receive photons generated by the high energy pulsed laser bombardment of the substance to be tested and perform spectral analysis; - a signal acquisition component, provided between the substance to be tested and the spectrograph to collect photons to the spectrograph; and - a vibration optical path assembly configured for light to pass through and forming a light spot, provided between the laser and the substance to be tested to focus the high energy pulsed laser to the substance to be tested to form the light spot, the vibration optical path assembly comprising: * an optical platform; * a vibration generating device configured to adjustably generate a first vibration; and ∗ an optical lens configured for the light to pass through to form the light spot; characterized in that the vibration optical path assembly further comprises: ∗ a cantilever, at least comprising a vertical arm (1121,) disposed at the optical platform and a cross arm disposed at the vertical arm, wherein the vertical arm is perpendicular to the optical platform, the cross arm is parallel to the optical platform, a top part of the vertical arm is connected to a middle position of the cross arm in an extending direction of the cross arm; and at least one of the vertical arm and the cross arm is made of an elastic material; wherein the optical lens is provided on the cantilever; wherein the vibration generating device is provided on the cantilever; wherein the cross arm is made of the elastic material; wherein the vibration generating device and the optical lens are respectively disposed at positions adjacent to two end parts of the cross arm; and wherein the first vibration is transmitted to the optical lens through the cantilever to generate a second vibration, and the light is passed through the optical lens with vibrating to generate a light spot movement phenomenon. - a laser, configured to emit a high energy pulsed laser; - a spectrograph, configured to receive photons generated by the high energy pulsed laser bombardment of the substance to be tested and perform spectral analysis; - a signal acquisition component, provided between the substance to be tested and the spectrograph to collect photons to the spectrograph; and - a vibration optical path assembly configured for light to pass through and forming a light spot, provided between the laser and the substance to be tested to focus the high energy pulsed laser to the substance to be tested to form the light spot, the vibration optical path assembly comprising: * an optical platform; * a vibration generating device configured to adjustably generate a first vibration; and ∗ an optical lens configured for the light to pass through to form the light spot; * an optical platform; * a vibration generating device configured to adjustably generate a first vibration; and ∗ an optical lens configured for the light to pass through to form the light spot; characterized in that the vibration optical path assembly further comprises: ∗ a cantilever, at least comprising a vertical arm (1121,) disposed at the optical platform and a cross arm disposed at the vertical arm, wherein the vertical arm is perpendicular to the optical platform, the cross arm is parallel to the optical platform, a top part of the vertical arm is connected to a middle position of the cross arm in an extending direction of the cross arm; and at least one of the vertical arm and the cross arm is made of an elastic material; ∗ a cantilever, at least comprising a vertical arm (1121,) disposed at the optical platform and a cross arm disposed at the vertical arm, wherein the vertical arm is perpendicular to the optical platform, the cross arm is parallel to the optical platform, a top part of the vertical arm is connected to a middle position of the cross arm in an extending direction of the cross arm; and at least one of the vertical arm and the cross arm is made of an elastic material; wherein the optical lens is provided on the cantilever; wherein the vibration generating device is provided on the cantilever; wherein the cross arm is made of the elastic material; wherein the vibration generating device and the optical lens are respectively disposed at positions adjacent to two end parts of the cross arm; and wherein the first vibration is transmitted to the optical lens through the cantilever to generate a second vibration, and the light is passed through the optical lens with vibrating to generate a light spot movement phenomenon.