Locking device for battery replacement and vehicle applying locking device

The invention provides a locking device for battery replacement and a vehicle applying the locking device. The locking device comprises a first lock body, a second lock body and a locking mechanism. The locking mechanism comprises a driving rod, an ejection steel column and two locking steel columns; the second lock body is provided with a locking cavity matched with the locking mechanism, and theejection steel column and the two locking steel columns are arranged in the locking cavity; the locking cavity is provided with a first opening and a second opening opposite to the first opening; thesecond lock body can extend into the first lock body, and the driving rod can extend into the locking cavity to control the position of the ejection steel column; the driving rod controls the positions of the ejection steel column to enable the ejection steel column to eject the two locking steel columns out of the first opening and the second opening correspondingly to be connected with the inner wall of the first lock b