Rotary drilling machine head

The utility model discloses a rotary drilling machine head which comprises a rotating shaft, a drilling barrel and a sealing cover, and the upper end and the lower end of the sealing cover are correspondingly and fixedly connected with the rotating shaft and the drilling barrel respectively. The side wall of the drilling cylinder is provided with a grouting hole which is communicated outwards, and a grouting channel which is communicated with the grouting hole is formed among the rotating shaft, the sealing cover and the drilling cylinder. Compared with a traditional barrel-shaped rotary drilling machine head, the rotary drilling machine head provided by the utility model integrates a slurry injection function, slurry with certain pressure can be injected to the side wall of a pile hole through the outer side wall of the drilling barrel in the rotary drilling process, and the slurry can be squeezed into the side wall of the pile hole to reinforce the side wall; meanwhile, the slurry can play a certain lubrica