The invention discloses a steel structure three-dimensional space positioning control method, which belongs to the technical field of steel structure manufacturing and assembling, and comprises the following steps: S1, establishing a three-dimensional
control point model of a component in CAD (
Computer Aided Design); s2, measuring three-dimensional coordinates of component control points by using a
total station on a component assembling site; s3, connecting the
total station with a computer through
Bluetooth, and transmitting coordinate data to the computer in real time; s4, reading coordinate data by using CAD, comparing the coordinate data through a program, and automatically outputting a deviation value to a position near a
model control point; the relative measurement technology is used, and an absolute coordinate
system is not needed, so that a measurement net does not need to be arranged on a
project site, and the method is not affected by the site; a
total station is adopted to directly measure coordinates,
station transfer is convenient and easy to operate, and the method is particularly suitable for high-strength assembling operation; deviation between a measuring point and a theoretical model is displayed in real time through
software data processing, the spatial position of the
assembly component is adjusted efficiently and conveniently, meanwhile, the
assembly precision is high, and the project construction period is shortened.