Underground retaining wall stirring drilling machine and pile machine equipment

The utility model relates to an underground retaining wall stirring drilling machine and pile machine equipment. The stirring drilling machine comprises a power head and a drill rod assembly which isdriven by the power head to rotate synchronously and comprises a plurality of drill rods. The lower end of a driving shaft of the power head is connected with the top of the drill rod through a connecting assembly, and multiple sections of the drill rod are connected through connecting assemblies. The connecting assembly comprises an outer connector and an inner connector. The outer connector is an inner hexagonal connector, and a horizontally-through fixing pin hole is formed in the side wall of the outer connector. The inner connector is an outer hexagonal connector, a horizontal fixing pingroove is formed in the position, corresponding to the fixing pin hole of the outer connector, of the inner connector, and the inner connector is clamped in the outer connector in a sleeved mode, horizontally penetrates throug