Coherent beam combining (CBC) of ultra-short pulsed lasers is a promising way to overcome the power and pulse width limitations from a single fiber. In this paper, the principles and technologies of coherent combining of ultra-short pulsed lasers in spatial, time and spectral domains were described. The current status of ultra-short laser CBC systems and their key technologies were reviewed, several future perspectives were pointed out. This paper can be a reference for future development of CBC of ultra-short pulsed lasers.