The invention discloses a method for quickly tunneling a shed type supporting roadway, which depends on mutual coordination among five big main apparatuses, namely a monorail crane roadway supporting platform, a cantilever type tunneling machine, a reversed loader, a stretchable belt conveyor and a monorail crane, and finishes the processes such as cutting, loading, conveying, supporting and paving in the tunneling construction of the shed type supporting roadway with a higher degree of mechanization. The monorail crane roadway supporting platform is hung on a special-purpose railway, the monorail crane is hung on an auxiliary conveying railway, the combination of the monorail crane roadway supporting platform and the monorail crane can realize mechanized transportation of head-on required materials, tools and apparatuses; a forepoling mounting beam lifts a top beam so as to serve as a temporary support, which not only reduces labor intensity but also reduces time consumed by the supporting process; the working platform is used as the platform of a roof and a two-side high-position operation, and thus optimizes construction condition; an auxiliary conveying system is convenient and fast to construct. The method increases the safety of the tunneling construction of the shed type supporting roadway, improves the starting up rate of the tunneling machine, and reduces the labor intensity.