Gear shifting device and forklift

The invention relates to the technical field of forklifts, in particular to a gear shifting device and a forklift. The gear shifting device comprises a shifting fork shaft which extends in the first direction and is fixed, a shifting fork and a locking piece. The shifting fork shaft is provided with a plurality of gear grooves distributed in the first direction. The shifting fork is matched with the shifting fork shaft and can move among a plurality of preset positions in the first direction to shift gears, the preset positions correspond to the gear grooves in a one-to-one mode, the shifting fork is provided with a sliding groove extending in the second direction, and one end of the sliding groove can correspond to the position where the gear grooves are located. The locking piece is arranged in the sliding groove in a sliding mode, and the locking piece is configured in the mode that when the shifting fork is located at one preset position, the first end of the locking piece protrudes out of the sliding gro