The invention relates to the technical field of greenhouse skeletons, in particular to a non-welding double-film greenhouse skeleton with a ventilator. The greenhouse skeleton comprises: a left detachable beam rack assembly, a right detachable beam rack assembly, a left supporting shaft beam, a right supporting shaft beam, an outer rolling shaft, an inner rolling shaft, an outer film roller and an inner film roller, wherein the left detachable beam rack assembly comprises a left outer film beam, a detachable rib plate and a left inner film beam, and the left outer film beam is fixed above the left inner film beam by the detachable rib plate. The greenhouse skeleton is reasonable and compact in structure and easy to use; the left inner film beam and the left outer film beam as well as the right inner film beam and the right outer film beam, which are connected with each other by the rib plate, can be conveniently disassembled, which not only improves the efficiency of building the greenhouse, but also greatly prolongs the service life of the skeleton; and by the outer rolling shaft as well as the inner rolling shaft arranged on the left supporting shaft beam and the right supporting shaft beam, the ventilation in the greenhouse is conveniently realized. The greenhouse skeleton has the characteristics of convenient ventilation, safety and tightness, high heat preservation, long service life, convenient and labor-saving construction and high efficiency.