The invention discloses a pallet carriage. The pallet carriage comprises wheel assemblies, connecting rod assemblies and traction assemblies. The bottoms of the wheel assemblies are provided with wheels. Each connecting rod assembly is connected between two corresponding wheel assemblies. The traction assemblies are mounted on the wheel assemblies or the connecting rod assemblies. The multiple connecting rod assemblies connect the multiple wheel assemblies into a whole to form the pallet carriage. The traction assemblies are mounted on the head and/or the tail of the pallet carriage in the advancing direction. Different sizes of connecting rod assemblies constitute different sizes of pallet carriages. According to the pallet carriage, the wheel assemblies are connected through different sizes of the connecting rod assemblies so that different sizes of pallet carriages can be formed; the pallet carriage with the expected size can be assembled as required at any time, and accordingly the total cost of transportation tools can be reduced for enterprises.