The mobile phone signal amplifier is a product specially designed to solve the blind area of the mobile phone signal. Because the mobile phone signal is based on the transmission of electromagnetic waves to establish communication links, because of the barrier of buildings, in some large buildings, in the basement, the basement and other places, such as shopping malls, restaurants, Cara OK massage and other places of entertainment, underground civil defense engineering, subway station and many other places, cell phone signals can not reach and can not use the hand Machine. The mobile signal amplifier can solve these problems very well. As long as a set of mobile signal amplifier system is installed in a particular place, the whole range of mobile phone signals can be used very well, which brings great convenience to the staff and guests inside.