Fixed place anti -eavesdrop device

The utility model provides an anti -eavesdrop device in fixed place, includes casing and fixed mounting in the inside anti -wiretap host computer of casing, external antenna, display screen, switch are installed to the casing, the anti -wiretap host computer includes a signal receiving unit, signal receiving unit is used for receiving broad scope frequency band radio wave, and will radio wave filters, enlargies, obtains the signal amplification of corresponding frequency band scope, a signal detecting element is used for accepting to come from signal receiving unit's signal amplification to contrast this signal amplification with normal electric wave signal, an and signal shielding unit, signal shielding unit basis signal detecting element's result. The utility model discloses can effectively detect the electric wave signal in fixed place to the electric wave signal of eavesdropping that will be different with normal electric wave signal screens out, and fixed place wireless communication's security has been