Abstract: The research progress on preparation technology, morphology, modification and application of three kinds of commonly used flux-cored brazing filler metals including flux-cored aluminum brazing filler metals, flux-cored silver brazing filler metals and flux-cored copper brazing filler metals is briefly described. The shortcomings of current research are pointed out. The research direction on the flux-cored brazing filler metals in the future will mainly focus on the following aspects:research on numerical simulation technology based on flux-cored brazing filler metal forming; research on the synergistic reaction between brazing alloy and brazing flux, and seam filling mechanism; research on low-cost and non-corrosive brazing flux; research and development of low-silver and low-cost flux-cored silver filler metals.