Attosecond pulse light source， born at the turn of 21st centruy， is a fully coherent light source with attosecond-temporal and nano-spatial resolution， leading to the remarkable progress and breakthroughs in attosecond science in the past two decades. New research methods and important innovation opportunities in physics， chemistry， biology， materials， information and other fields have emerged with the advent of attoseond pulse. This review surveys the important efforts aimed at developing attosecond pulses， mainly summarizes the key technologies and status of high-order harmonics， attosecond pulse generation and attosecond pulse measurement， and presents the development prospects of attosecond pulse research in the end.