Detection tool used for circuit board

Provided is a detection tool used for a circuit board. The detection tool includes a circuit board, a protective device and multiple terminals. The circuit board is fixed inside the protective device. The inner end face of the protective device is equipped with fixing columns that correspond to the terminals. The protective device includes a top cover plate and a bottom cover plate. The top cover plate, the circuit board and the bottom cover plate are connected from top to bottom to be a whole body through copper columns. The copper columns between the top cover plate and the circuit board and the copper columns between the circuit board and the bottom cover plate are fastened and fixed through nuts. A lead wire is fixedly arranged on the upper end face of the circuit board, and is electrically connected to the circuit board. Fixing columns are fixedly arranged on the upper end face of the bottom cover plate, and are electrically connected to the circuit board. When the detection tool detects a circuit, the terminals and the circuit board are connected through the fixing columns, thereby avoiding frequent wiring and plugging, and simplifying a circuit board detection process. The detection tool is time-saving and labor-saving, enables the circuit board detection efficiency to be improved, and prevents errors caused by wiring during the circuit board detection process.