In the Milky Way, most of star-formingregions concentrate in a a group of nearby clouds in thenearby Gould Belt region. However, this is not the bulk of star formationcloud in the Milky Way, especially massive star formation. Using thenearly-all sky CO CfA survey, we conduct a throughout search ofmassive molecular complexes that host most of star formation activitiesin the Milky Way

 In this talk, I will discuss thevariation of the scaling laws and star formation laws for MCCs fromthe traditional Schmidt-Kennicutt laws. We propose to use theSchmidt-Kennicutt diagram to distinguish the starburst from the normalstar-forming structures by applying a gas density and star formationtheshold. We define mini-starburst complexes have enhanced SFR,probably caused by dynamic events such as radiation pressure, collidingflows, or spiral arm gravitational instability. Because of thedynamical evolution, gravitational boundedness does not play asignificant role in characterizing the star formation activity of MCCs,especially the mini-starburst complexes. These mini-starburstMCCs have the potential of serving as a local scale for comparing withextragalactic starburst compnents, especially in the era of ALMA.