The invention discloses a detection method for a steel structure member. The method is characterized in that: a detected member is actually measured by using an electronic total station to establish a three-dimensional line model matched with a design model; and the distance between corresponding points is measured to check whether each field interface meets a design requirement. The method comprises the following specific detection steps of: establishing a design model and a three-dimensional line model; measuring the distance between corresponding points; and correcting the member. Compared with the prior art, the detection method has the advantages of high detection accuracy, low cost, capability of solving the inspection problem of a complex member, convenience for detecting and short measuring time.