The invention relates to a counting method and a counting device of bent lamp tubes. The counting method comprises the following steps: a bent lamp tube supporting device which is obliquely arranged is adopted so that the bent lamp tubes move along the bent lamp tube supporting device in a sliding way; the lateral part of the bent lamp tube supporting device is provided with a counting sensor, and when the bent lamp tubes move along the bent lamp tube supporting device in the sliding way, the counting sensor counts the bent lamp tubes so as to obtain the number of the bent lamp tubes. The counting method and the counting device has reasonable design, can realize the fast and precise counting of the bent lamp tubes without causing any damage on the bent lamp tubes and solve the problems ofstatistic precision and large man-hour consumption of manual counting, thereby enabling counting work to be simple and convenient and having high production efficiency.