Crossing frame blocking device and method based on active protection

The invention discloses a crossing frame blocking device and method based on active protection, and belongs to the technical field of crossing frame blocking protection. The invention discloses a crossing frame net blocking device and method based on active protection, and the device comprises two temporary cross arms which are respectively arranged on adjacent crossing towers, two ends of the two temporary cross arms are correspondingly provided with two-wheel eye pulleys, and a bearing rope and an adjusting rope which are arranged up and down are disposed between the two-wheel eye pulleys. Two ends of the bearing rope and the adjusting rope are fixed on the ground through ground anchors; a plurality of pulley lifting hook assemblies which are opposite in pairs are arranged on the bearing ropes, a supporting rod is arranged between the opposite pulley lifting hook assemblies, and protection assemblies used for fixing the adjusting ropes are arranged at the two ends of the supporting rod. Once the wire is bro