The utility model discloses a fast dynamic railroad track scale without rail breaking. The utility model is characterized in that: a plurality of guard rails(3,4,5,6) are arranged at the two sides and the middle of two weighting rails(1, 2) which are connected with the train rail; the weighting rails(1,2) and the guard rails(3,4,56) are fixed at the special cement sleeper(10) for track scale through high-strength bolts(11) and fasteners(12); the lower part of the weighting rails(1,2) are provided with 10 to 14 special bright weighting devices(7), 6 to 10 shearing force sensors(8), two sets of multi-channel smart measuring passages, an industrial computer, an automatic train number identification system, a wireless transmission and computer receiving device, and on-line uninterruptible power supply and a mine isolation transformer. The utility model can implement on-line fast weighting and has the advantages of simple structure, accurate measurement, long-term stability, reliable operation and convenient maintenance.