The invention relates to an anti-silting rapid self-rescue round log fixing automatic disengaging device for a tracked vehicle. The device comprises a disengaging base, the cross section, in the horizontal direction, of the disengaging base is a rectangle, the end face, facing downwards, of the disengaging base is a semicircle with the middle protruding downwards, the arc-shaped surface of the semicircle is located in the left-right direction, a lower piercing hole for installing a wire rope ring is formed in the lower middle part of the disengaging base in the front-back direction, the end face, facing upwards, of the disengaging base is a plane, a connecting lug plate is connected to the top of the disengaging base, the board of the connecting lug plate is located in the left-right vertical direction, and the bottom of the connecting lug plate is fixedly connected with the middle of the top of the disengaging base in the front-back direction, a left clamping block is arranged on theupper portion of the left side of the connecting lug plate, a right clamping block is arranged on the upper portion of the right side of the connecting lug plate, a connecting block is arranged on theupper portion of the middle of the connecting lug plate. The anti-silting rapid self-rescue round log fixing automatic disengaging device for the tracked vehicle can not only rapidly and efficientlyfix a self-rescue round log but also achieve automatic disengaging in good time. The problems that interference of a tracked vehicle anti-silting self-rescue round log fixing device and a driving gearappears, and the round log is caught upwards in a drive track, so that related machine parts and articles are damaged are effectively prevented.