A method for locating a faulty tower-top device, comprising: detecting a working current of each tower-top device in real time to obtain present current value information of each tower-top device; and controlling, according to the present current value information of each tower-top device, a fake load configured to simulate the working current of the tower-top device to make a current of an input port of the fake load equal to the present current value information of the tower-top device, so that a base station without an antenna interface standards group AISG protocol communication function learns the present current value information of the tower-top device by detecting the current of the input port of the fake load simulating the tower-top device, and determines whether the tower-top device is faulty according to the present current value information of the tower-top device; wherein, the fake load comprises a low dropout linear regulator, LDO, configuration resistors R1, R2 and R3, and a power consumption resistor R; the LDO comprises an enable pin ENABLE pin, a standard feedback pin ADJ pin, an input pin VIN pin, an output pin OUT pin and a ground pin GND pin; the ENABLE pin is connected to a tower-bottom micro control unit, MCU; the tower-bottom MCU controls enabling and disabling of the LDO via the ENABLE pin; the VIN pin is connected to a base station; the base station provides the LDO with a power supply via the VIN pin; a current flowing through the VIN pin is a current I vin of the input port of the fake load, wherein the VIN pin is the input port of the fake load; R1 is connected between the ADJ pin and the OUT pin; R2 is connected between the ADJ pin and the GND pin; R3 is connected between the ADJ pin and the tower-bottom MCU; R is connected between the OUT pin and the GND pin; a current flowing through R is equal to I vin; and the tower-bottom MCU provides the fake load with a control voltage V C via the R3 and the ADJ pin; wherein the controlling, according to the present current value information of each tower-top device, a fake load configured to simulate the working current of the tower-top device to make a current of an input port of the fake load equal to the present current value information of the tower-top device comprises: making, by the tower-bottom MCU, the current I vin of the input port of the fake load equal to the present current value information of the tower-top device by adjusting the control voltage V C of the fake load configured to simulate the working current of the tower-top device according to a first corresponding relation between the control voltage V C of the fake load and the current I vin of the input port of the fake load. detecting a working current of each tower-top device in real time to obtain present current value information of each tower-top device; and controlling, according to the present current value information of each tower-top device, a fake load configured to simulate the working current of the tower-top device to make a current of an input port of the fake load equal to the present current value information of the tower-top device, so that a base station without an antenna interface standards group AISG protocol communication function learns the present current value information of the tower-top device by detecting the current of the input port of the fake load simulating the tower-top device, and determines whether the tower-top device is faulty according to the present current value information of the tower-top device; wherein, the fake load comprises a low dropout linear regulator, LDO, configuration resistors R1, R2 and R3, and a power consumption resistor R; the LDO comprises an enable pin ENABLE pin, a standard feedback pin ADJ pin, an input pin VIN pin, an output pin OUT pin and a ground pin GND pin; the ENABLE pin is connected to a tower-bottom micro control unit, MCU; the tower-bottom MCU controls enabling and disabling of the LDO via the ENABLE pin; the VIN pin is connected to a base station; the base station provides the LDO with a power supply via the VIN pin; a current flowing through the VIN pin is a current I vin of the input port of the fake load, wherein the VIN pin is the input port of the fake load; R1 is connected between the ADJ pin and the OUT pin; R2 is connected between the ADJ pin and the GND pin; R3 is connected between the ADJ pin and the tower-bottom MCU; R is connected between the OUT pin and the GND pin; a current flowing through R is equal to I vin; and the tower-bottom MCU provides the fake load with a control voltage V C via the R3 and the ADJ pin; wherein the controlling, according to the present current value information of each tower-top device, a fake load configured to simulate the working current of the tower-top device to make a current of an input port of the fake load equal to the present current value information of the tower-top device comprises: making, by the tower-bottom MCU, the current I vin of the input port of the fake load equal to the present current value information of the tower-top device by adjusting the control voltage V C of the fake load configured to simulate the working current of the tower-top device according to a first corresponding relation between the control voltage V C of the fake load and the current I vin of the input port of the fake load.