The present disclosure discloses a quickly dismantlable floor member and a spliced floor, to solve the technical problem that the conventional floor members cannot be dismantled conveniently for repairing and replacement. The quickly dismantlable floor member is of a tetragon shape, a lateral face of a first side of the quickly dismantlable floor member is provided with an automatic latch, the automatic latch comprises a locking head, the locking head is retractable, and the locking head is able to, after the quickly dismantlable floor member is installed, join with an neighboring conventional floor member. The spliced floor employs three or more quickly dismantlable floor members.