The utility model provides a high -efficient installation steel connection structure of high strength belongs to the steel construction field. It has solved current steel connection structure intensity problem on the low side. This high -efficient installation steel connection structure of high strength, including I -steel owner connecting piece and the vice connecting piece of right angle steel, last pterygoid lamina and lower pterygoid lamina that main connecting piece includes the web and is parallel to each other, vice connecting piece includes mutually perpendicular's last steel sheet and side steel sheet, go up steel sheet terminal surface and last pterygoid lamina one side vertical welding, the side end portion of the steel plate extend, and perpendicular bending type becomes the connecting plate of fixing with the web laminating, the connecting plate is kept away from one side of side steel sheet and is buckled and have the backup pad, it is fixed on one side of the last steel sheet of side steel sheet orientation that one side of connecting plate is kept away from to the backup pad, the side pushes up at last pterygoid lamina bottom surface and last bottom of steel plate perpendicularly respectively in the backup pad, and the side is crossing on going up steel sheet terminal surface and backup pad. This steel connection structure can stable connect I -shaped main steel beam and right angle steel auxiliary girder, and the simple to operate cost is lower.