The invention provides measuring equipment having a double-loop ALC circuit. The input end of a second adjustable radio frequency attenuator is the input end of the double-loop ALC circuit, and the output end is connected with the input of a first adjustable radio frequency attenuator; the output end of the first adjustable radio frequency attenuator is connected with the input end of a power divider; two output ends of the power divider are connected with the output end of the double-loop ALC circuit and the input end of a detector; the output end of the detector is connected with the input end of the ADC module; the output end of an analog-to-digital module is connected with the input end of a digital chip; two output ends of the digital chip are connected with input ends of a first DAC module and a second DAC module; the output end of the first DAC module is connected with an adjusting end of the first adjustable radio frequency attenuator; and the output end of the second DAC module is connected with the adjusting end of the second adjustable radio frequency attenuator. By adoption of the measuring equipment having the double-loop ALC circuit, the requirements of large adjustable range of ALC, high resolution and low jitter of a signal source can be met.