The invention discloses a universal rolling mill house installation tooling and an installation method and relates to the field of universal rolling mill assembling. The invention provides the universal rolling mill house installation tooling which can simplify a universal rolling mill house installation process and a method for installing universal rolling mill houses by using the tooling. The universal rolling mill house installation tooling comprises four groups of tensioning components, wherein each tensioning component comprises a tensioning screw, a first cushion plate, a guide sleeve, a second cushion plate and tensioning nuts; the tensioning screw comprises a polish rod part and a threaded part, and a fixing nut is arranged at the end part of the polish rod part; the first cushion plate, the guide sleeve and the second cushion plate are sequentially sheathed on the tensioning screw, and the tensioning nut is screwed onto the threaded part; a guide cone is arranged at one end, close to the tensioning nut, of the guide sleeve. When the universal rolling mill houses are installed, a horizontal roll house and a vertical roll house are aligned through the guide effect of the guide sleeve. By using the tooling and the method disclosed by the invention for installing the universal rolling mill houses, the closing time of the horizontal roll house and the vertical roll house can be greatly shortened and the labor intensity is relieved.