Abstract: Pot experiments were conducted to study the influence of cadmium pollution on the branching and flowering stages of alfalfa, and to evaluate the safety for production of alfalfa. The biomass of alfalfa was more easily affected by Cd at the branching than at the flowering stage with soil concentrations of 0.37-20.37 mg/kg Cd. At both branching and flowering stages, the Cd contents in the body of the alfalfa plants were significantly positively correlated with Cd in the soils and at the branching stage were more than 2.9-28.5 times higher than at the flowering stage. At the flowering stage, the Cd contents of above-ground parts of alfalfa were 0.213 mg/kg dry weight and did not exceed the forage health standards (Cd: 0.5 mg/kg GB 13078-2001) when Cd was 5.37 mg/kg in the soil. Compared with the flowering stage, at the branching stage, the Cd contents of above-ground alfalfa parts exceeded the forage health standard. The contents of Cd in soils should not exceed 0.55 mg/kg at the branching stage and 9.37mg/kg at the flowering stage according to the fitted equation. In the above situations, Cd contents of above-ground alfalfa parts did not exceed the forage health standard.