Butt-joint locking interface device capable of actively conducting heat for spacecraft

The invention discloses a butt-joint locking interface device capable of actively conducting heat for a spacecraft. The butt-joint locking interface device comprises a driving end and a driven end, wherein the driving end comprises a six-degree-of-freedom floating liquid path disconnector movable end and a cold plate pipeline assembly; the cold plate pipeline assembly comprises a cold plate, a hose, a cold plate joint A and a cold plate joint B; the driven end further comprises a six-degree-of-freedom floating disconnector fixed end; a multifunctional pin comprises a height limiting part, a tightening part and a locking part; the height limiting part is a straight pin with a set length; the tightening part is an inclined plane positioned at the front end of the multifunctional pin; the locking part is positioned at the rear end of the height limiting part on the multifunctional pin and is higher than the height limiting part; a guide hole is machined in a shell, one side face of the guide hole is composed of