The utility model relates to a directed handset signal blocking instrument, which belongs to the field of information secrecy and safety. The utility model mainly adopts fast sweep-frequency technology and directed cover technology to disturb the down channel of mobile communication, taking action on frequency ranges for CDMA800M, GSM900M, DSC1800M, PCS1900M, making the mobile communication in the appointed place be cut off. The utility model is mainly composed of a sawtooth wave generator, a voltage control oscillating circuit, a high frequency power amplification circuit, a directed antenna, power, a remote control emitting assembly, etc. The directed handset signal blocking instrument has the advantages of strong disturbance effect and large disturbance area by adopting the fast sweep-frequency technology; the directed cover technology and the horsepower stepless adjustable design can flexibly control the disturbance direction and the disturbance distance according to the demand of the environment; the utility model uses built-in power and a remote control switch, having convenient installation and convenient use; the utility model adopts an advanced and novel integrated chip, having exquisite design, stable performance and low cost; the directed handset signal blocking instrument has low power consumption, and has no influence for human body health.