The invention is suitable for the technical field of black watermark identification, and provides a black watermark identification method and device and terminal equipment. The black watermark identification method comprises the steps that a paper image corresponding to paper requiring black watermark identification is acquired; the position of the black watermark on the paper image is located according to a preset sliding window; and projection and column protection are performed on a black watermark image corresponding to the located black watermark; and the authenticity of the black watermark is identified according to the value obtained after projection and column projection. With application of the method, the accuracy of black watermark identification can be enhanced.