The BP neural network model, with charging amount of blasting cut, blasting center distance and blasting velocity as main factors, is established based on LeyenbergMarquardt (LM) calculation method; and the blasting vibration velocity is predicted and analyzed. The charging amount of blasting cut is calculated by means of critical blasting vibration velocity in related criteria. The calculation results show that LMBP neural network method is superior to traditional method in terms of prediction of blasting vibration velocity; the blasting cut charging amount calculated by means of critical blasting vibration velocity inverse calculation method is rational and effective.