In order to guarantee the reasonable distribution of wheel load and axle load for a 100% low floor tram with float carbody, a theoretical calculation method of wheel load and axle load was studied for the tram by force analysis of carbodys and bogies. Taking the existing tram as an example, the wheel load and axle load simulation and analysis model was established by using SIMPACK software, and the theoretical calculation results were compared with the simulation analysis results to verify the correctness of the theoretical calculation method.