Forklift overload protection device and method

The invention discloses a forklift overload protection device and method. The forklift overload protection device comprises a cargo detection unit, a control system, an overload protection execution mechanism, a service data management system and a visual operation interface. The method comprises the steps of calculating the centre-of-gravity position of cargos; calculating the centre-of-gravity position and a synthesized centre-of-gravity position of a forklift; judging whether the forklift is overloaded or not according to whether the synthesized centre-of-gravity position is located in a stability area or not; and adjusting the gravity center of the forklift through an execution mechanism to change the synthesized centre-of-gravity position when the forklift is overloaded to enable thesynthesized centre-of-gravity position of the forklift is located in the stability area. According to the forklift overload protection device and method, whether the cargos are overloaded or not is judged by real-time dynamic