The utility model provides a steel column and girder steel connecting plate positioner, belongs to steel construction building technical field, and it is in the T type groove that the one end system of base has three intervals to equal and be parallel to each other, is provided with the slider at the T of centre type inslot, the slider above vertical fixation pivot, angle adjusting plate of installation in the pivot angle adjusting plate's both ends made rectangular hole symmetrically, each rectangularly downthehole set up a T type hook bolt, along baffle of interior side mouth rigidity of angle adjusting plate, mutually perpendicular between baffle and the angle adjusting plate, the utility model has the advantages of the commonality is better, and labor efficiency is higher in the production, and product quality easily guarantees.