The utility model belongs to the technical field of the warning of intaking, concretely relates to cable pit alarm device of intaking, the problem of the technique is solved for: the utility model provides a can monitor intaking in the cable pit, and can carry out the cable pit alarm device of intaking that reports to the police, the technical scheme who adopts does: a cable pit alarm device of intaking, is including setting up the casing in the cable pit, be provided with the through -hole on the casing, be equipped with signal generating module, signal amplification module, central processing unit, wireless signal transmitting device, alarm device and power supply in the casing, signal generating module's output links to each other with the input of signal amplification module, the output central processing unit's of signal amplification module input links to each other, central processing unit's output and alarm device link to each other, power supply is the central processing unit power supply, signal generating module passes through the through -hole links to each other with the detection agency that sets up outside the casing, the device is suitable for the electric power system.