The invention provides a method and device for three-point transmitter tube hoop, relates to a field of pneumatic pipeline transmitting, in particular to a tube hoop of a pneumatic pipeline transmitter. An existing tube hoop is easy to drop off, accordingly a transmitter is stuck on the transmitting pipeline and a transmitting system is unsmoothing; the existing tube hoop is poor in wear resistance, and friction coefficient is large; some transmitter tube hoop monomer is large in quantity, not easy to produce and high in production cost. According to the three-point transmitter tube hoop, at least three monomer projections are mounted at each end of the peripheries of two ends of of the transmitter.