The invention provides a high output voltage micro-strip difference rectification antenna based on a WIFI frequency band. The micro-strip difference rectification antenna based on the WIFI frequency band comprises a micro-strip receiving antenna and a micro-strip difference rectification circuit, wherein the micro-strip receiving antenna and the micro-strip difference rectification circuit are manufactured on a metal layer on the upper layer of a two-sided copper-coated dielectric substrate and connected through an SMA hermaphrodite connector. The micro-strip difference rectification antenna based on the WIFI frequency band adopts a disc-shaped slotting technology, so that the antenna has high direction gains, a wide work frequency band and low loss. A micro-strip line feed method is adopted, a multi-unit array can be formed easily, and the micro-strip difference rectification antenna based on the WIFI frequency band can be applied to large-power occasions. The positive and negative electrodes of a rectification diode are arranged on one side of a dielectric slab and are connected in the rectification circuit in series, and platemaking is easy; the rectification circuit is of a symmetrical structure, the size of the circuit is reduced, the complexity and machining difficulty of the system are reduced, and the integration degree is improved; the rectification circuit adopts a differential voltage output mode, the whole design is not provided with via holes, the parasitic parameter is small, the system performance is good, and output voltage is high.