The invention relates to a combined type multi-passageway rotary joint comprising a mandrel and an outer sleeve. The mandrel is coaxially sleeved with the outer sleeve which is rotationally adjusted; an oil way passageway is made in the mandrel which is composed of a mandrel bottom module, mandrel combination modules and a mandrel top module; the multiple mandrel combination modules are coaxially installed at the upper end of the mandrel bottom module; and the mandrel combination module at the uppermost end is coaxially provided with the mandrel top module. The outer sleeve is composed of an outer sleeve bottom module, outer sleeve combination modules and an outer sleeve top module; the mandrel bottom module is coaxially sleeved with the outer sleeve bottom module; the mandrel combination modules above the outer sleeve bottom module are coaxially sleeved with the multiple outer sleeve combination modules; the outer sleeve top module is coaxially installed outside the portion, at the upper end of the outer sleeve combination module at the uppermost end, of the mandrel top module; a bearing is installed between the radial contact face of the mandrel bottom module and the radial contact face of the outer sleeve bottom module; and a bearing is installed between the radial contact face of the outer sleeve top module and the radial contact face of the mandrel top module. The modularized design is adopted for the combined type multi-passageway rotary joint, and the universality of equipment is improved.