Disclosed are an electric control assembly and an electrical device. The electric control assembly includes an electric control board and a metal plate arranged on one side of the electric control board in parallel. The electric control board includes a first filter circuit and a power supply line. The power supply line includes a power input terminal, a rectifier circuit, an intelligent power module and a power output terminal. The power input terminal, the rectifier circuit, the intelligent power module and the power output terminal are connected in sequence. A first end of the first filter circuit is connected with the power supply line. The metal plate and the electric control board are arranged at an interval. The metal plate is electrically connected with a shell of the electrical load. A second end of the first filter circuit is electrically connected with the metal plate.