Rock pipe-jacking machine adjustable secondary crushing structure

The invention discloses a rock pipe-jacking machine adjustable secondary crushing structure comprising a bin cylinder. A material stripping mechanism is arranged in the bin cylinder, the tail end of the material stripping mechanism communicates with a stirring crushing mechanism, and the stirring crushing mechanism comprises a conical grid plate and an adjusting oil cylinder for driving the conical grid plate to move in the front-back direction and communicates with a discharging mechanism. When the rock pipe-jacking machine adjustable secondary crushing structure is used, rocks are stripped off through rotary squeezing and crushing of a rock cutter disc, the stripped-off rocks enter a stirring crushing bin through an opening of a rock cutter disc panel, and the conical grid plate moves in the front-back direction under driving of the adjusting oil cylinder to change the area of the shearing and crushing sector so as to adapt to the sizes of current rock broken particles; and meanwhile, front-back squeezing f