The invention discloses a power detection device, which belongs to the field of power detection. The device comprises a
voltage detection unit, a current detection unit, and a
processing unit, wherein the
voltage detection unit is used for detecting a
voltage value of a to-be-detected element on a circuit board and outputting a first voltage value; the current detection unit is used for detecting a current value of the to-be-detected element and outputting a second voltage value; the
processing unit is used for calculating power of the to-be-detected element according to the first voltage value and the second voltage value; the current detection unit comprises a first hall sensor, a second hall sensor and an amplifying circuit, the first hall sensor and the second hall sensor are arranged close to an input line of the to-be-detected element, the positive
electrode of the first hall sensor is connected with a power supply, the negative
electrode of the first hall sensor is connected with the input end of the amplifying circuit, the negative
electrode of the second hall sensor is connected with the power supply, the positive electrode of the second hall sensor is connected with the input end of the amplifying circuit, and the output end of the amplifying circuit is connected with the
processing unit. The power detection device can realize power measurement on a micro-
power consumption element.