The invention relates to a distance adjustment pallet fork with guard boards. The distance adjustment pallet fork comprises a forklift frame mounted on a gantry frame, a left pallet fork body, a right pallet fork body, a left pallet fork oil cylinder and a right pallet fork oil cylinder, wherein the left pallet fork body is mounted on the forklift frame in a horizontal displacement manner, the right pallet fork body is mounted on the forklift frame in a horizontal displacement manner, the left pallet fork oil cylinder controls horizontal displacement of the left pallet fork body, the right pallet fork oil cylinder controls horizontal displacement of the right pallet fork body. The upper portion of the forklift frame is further provided with the left guard board with a horizontal displacement function, the right guard board with a horizontal displacement function, a left guard board oil cylinder for controlling horizontal displacement of the left guard board and a right guard board oil cylinder for controlling horizontal displacement of the right guard board. According to the distance adjustment pallet fork, the left guide board and the right guard board are additionally arranged, so that the problem that large and unstable articles with the high center of gravity are easy shake or even tilt during the carrying process is solved, and accordingly the practicality and the stability of the distance adjustment pallet fork are enhanced.