The invention belongs to the technical field of indoor construction erection equipment, and relates to a housing construction indoor super-high template bailey beam support system and a construction method thereof. The support system comprises a plurality of lower support beams, a plurality of bailey beams and a plurality of I-shaped steels, the construction method of the housing construction indoor super-high template bailey beam support system comprises the following steps that A, the lower support beams are well placed; B, bailey slices are transported to a designated spot to form the bailey beams; C, the bailey beams are erected on the lower support beams; D, the I-shaped beams are connected to the upper ends of the bailey beams; E, location ribs are mounted on the I-shaped steels; F,the I-shaped steels are fully paved with treads, and an anti-dropping net is fully hung below the treads; G, a scaffold is mounted on the support system; and H, a rebar head is arranged in the middleof each bailey beam and serves as a settlement observation point. According to the housing construction indoor super-high template bailey beam support system and the construction method thereof, the problems that construction is not convenient, and the structure is not stable in the erection process of the super-high template in the prior art are solved.