The invention relates to the technical field of smoke analysis and especially relates to an automatic weighing device for a tobacco holder. The automatic weighing device for the tobacco holder, provided by the invention, comprises a clamp, a frame, a tray, a clamping jaw and a balance scale, wherein the tray, the clamping jaw and the balance scale are arranged on the frame; the tray is arranged on the frame in the manner of moving along z axis direction of the frame; the clamp is arranged in the tray; and the clamping jaw is arranged on the frame in the manner of moving along x and y axis directions of the frame corresponding to the clamp. The tray of the tobacco holder provided by the invention can move along the z axis direction of the frame and the clamping jaw can move along the x and y axis directions of the frame corresponding to the clamp, so that the automatic measurement can be realized; in the whole measuring process, the clamp is not in contact with other objects, so that the influence on the quality is reduced; and the automatic weighing device has the advantages of simple structure and accurate measurement.