A low-emission hot-in-place asphalt recycling equipment train system is disclosed, which comprises at least three heating units, a milling unit, a centralized hot mix heating unit, a mixing unit, and compatible paving and compacting units. The hot-in-place asphalt recycling equipment train system realizes stepwise uniform heating of pavements, recycling of heat energy, centralized treatment and discharge of fumes, centralized and uniform hot mix heating of materials without causing damage, simultaneous metering and feeding of required materials at multiple points, and on-site mobile batch mixing.