Operation vehicle and electricity leakage detecting method thereof

The invention provides an operation vehicle and an electricity leakage detecting method thereof employing a simple circuit for judging electricity leakage with high precision. The operation vehicle is provided with a leakage detecting part (5) used for leakage detection of the electric capacitor; a circuit transferring switch cutting the capacitor (2) from a load circuit (1) and connecting the leakage detecting part (5) to the capacitor and besides cutting the leakage detecting part (5) from the capacitor and connecting the capacitor (2) to the load circuit (1); and a microcontroller making the circuit transferring switch (SW) to work, cutting the capacitor (2) off from the load circuit (1) and connecting the leakage detecting part (5) to the capacitor (2) when that the capacitor (2) is fully charged and current of the load circuit (1) is zero are detected, making the circuit transferring switch work, cutting the leakage detecting part (5) off from the capacitor (2) and connecting the capacitor (2) to the loa