The invention discloses a sighting plate for colour selecting equipment. The sighting plate comprises a vertical plate and a support leg which are fixed together, wherein the upper part of the vertical plate is a vertical plate region A; the lower part of the vertical plate is a vertical plate region B; a left positioning slot and a right positioning slot are symmetrically reserved at the left and right positions at the upper end of the vertical plate region A; a left positioning table and a right positioning table are symmetrically arranged at left and right ends at the junction of the vertical plate region A and the vertical plate region B and are projected outwards from the vertical plate region A; a longitudinal central narrow slot is reserved in the centre of the vertical plate region B in the width direction; a left correcting narrow slot group and a right correcting narrow slot group are arranged on left and right sides of the central narrow slot respectively; symmetric left narrow slot and right narrow slot are reserved on two sides of the left correcting narrow slot group and the right correcting narrow slot group close to the edge of the vertical plate region B respectively; and the centers of the central narrow slot, the left correcting narrow slot group, the right correcting narrow slot group, the left narrow slot and right narrow slot are positioned on the same straight line parallel to the lower edge of the vertical plate region B. The sighting plate has the advantages of simple structure, strong function, reliable result, low cost, high utilization rate and the like.