Device for detecting content of heavy metals in water

A device for detecting the content of heavy metals in water relates to the technical field of water quality detection and comprises a detection shell, a detection box, a water inlet pipeline and a water outlet pipeline, the detection box, a double-voltage power supply, a single chip microcomputer, a motor and an uninterruptible power supply are arranged in the detection shell, and the water inlet pipeline is connected with the detection box. A stirrer, a reference electrode, a working electrode and an auxiliary electrode are arranged in the maintenance box, a water outlet pipeline penetrates through the detection shell and is connected with the detection box, an electric control valve and a water suction pump are arranged on the water outlet pipeline, and positive and negative voltages are applied to the working electrode through a double-voltage power supply, so that a detected substance is enriched on the electric electrode; after enrichment is carried out for a period of time, a reverse voltage is applied