Stop-grouting plug for deep hole section

A deep hole section grout stopping plug relates to the field of engineering construction and comprises a connecting piece and a grout stopping assembly, the connecting piece is detachably connected to the lower portion of a drill rod through right-hand threads, a vertically-through center hole is formed in the middle of the connecting piece, a vertically-through grout inlet hole is formed in the edge of the connecting piece, the center hole is communicated with an inner channel of the drill rod, and the grout stopping assembly is arranged in the center hole. The slurry inlet is externally connected with a hose; the grout stopping assembly is detachably connected to the lower portion of the connecting piece through left-hand threads and comprises a grout outlet pipe, a bag and a connecting seat, the grout outlet pipe is connected with the connecting seat, the connecting seat is connected with the connecting piece, the grout outlet pipe is communicated with the center hole, the bag is used for receiving grout f