The invention discloses a method for measuring the position of the sun, comprising the following steps: establishing a survey coordinate system, the focal point of a disc and a light shielding column is the O point, the inward direction is the x axis, the right hand direction is the y axis, and the z axis is upward; along with variance in relative position of the sun, the light shielding column forms a shadow with a length of l on a sensitive plate of the disc, the included angle between the shadow and the x axis is alpha; according to the shadow parameter l and the light shielding column length h, the angle beta which is the included angle between the shadow of the light shielding column and the sun ray can be determined by tan beta=h/l; and the position of the sun can be determined according to the light path theory. The method for measuring the position of the sun is accurate, effective, low in cost and high in reliability.