Novel loosening and disengaging preventing gasket

The invention relates to the field of machine accessories, in particular to a novel loosening and disengaging preventing gasket. A plurality of loosening preventing teeth inclined anticlockwise or clockwise are evenly formed on the front end face of the gasket, and a plurality of loosening preventing teeth inclined anticlockwise or clockwise are also evenly formed on the back end face of the gasket. The inclined directions of the loosening preventing teeth on the two end faces are identical in spiral direction in the front directions of the respective end faces, the spiral directions of the loosening preventing teeth are determined by the spiral direction of a thread of a bolt, and the loosening preventing teeth incline clockwise if the thread spirals rightwards and incline anticlockwise if the thread spirals leftwards. When the novel loosening and disengaging preventing gasket is used for connection, firm loosening preventing meshing can be formed between a connecting piece (such as a nut and a bolt) and a connected piece. The novel loosening and disengaging preventing gasket is simple in structure, stable, reliable, low in manufacturing cost and wide in application range.