The invention discloses an attention detection method with the combination of sight detection. The method includes face detection, eye closing detection, eye sight detection and head deflection detection, images are captured through cameras, and eye closing characteristics, head deflection characteristics and sight characteristics of students in each frame are analyzed to determine whether the attention of the students is focused. According to the attention detection method, with the combination of the sight detection method, the problems that the students are in head emmetropia, eyes are open, and the sight is in an area outside a computer screen are solved, the concentration condition of the attention of the students during online learning can be detected, the method is advantaged by high accuracy, good stability and high reliability, and the method is scientific and practical.