The invention provides a method for excavating a combined vertical erection branch part of a super-large rocky section tunnel steel frame rock wall. The method includes the specific steps that an excavation section of a tunnel is set, wherein an upper left pilot tunnel is a first excavation part, an upper right pilot tunnel is a second excavation part, the upper left pilot tunnel and the upper right pilot tunnel constitute an upper excavation section, a lower left pilot tunnel is a third excavation part, a lower right pilot tunnel is a fourth excavation part, a rock wall body is a fifth excavation part, the lower left pilot tunnel, the lower right pilot tunnel and the rock wall constitute a lower excavation part, and besides, a first supporting and protecting part, a second supporting andprotecting part, a third supporting and protecting part, a fourth supporting and protecting part and a fifth supporting and protecting part are included; the various excavation parts are excavated inturn, and primary support and protection is conducted on the corresponding supporting and protecting parts; in the entire excavation process, the second excavation part is kept lagging behind the first excavation part, the third excavation part lags behind the second excavation part, and the fourth excavation part lags behind the third excavation part. According to the method, large-scale machinery is convenient to work in the case of a super-large section tunnel, the excavation speed is fast, and the economic benefit is obvious.