The invention relates to a comprehensive operation parameter monitor for low-voltage clients. The comprehensive operation parameter monitor for the low-voltage clients comprises a leakage current sampling module for sampling leakage current, a load current sampling module for sampling load current, a voltage sampling module for sampling voltage, a data processing module, a display module and an alarm module, wherein the data processing module comprises a leakage current reading circuit for reading a leakage current value, a load current reading circuit for reading a load current valve, a voltage reading circuit for reading a voltage value, a leakage current analysis and statistic submodule for monitoring the leakage current condition, a voltage analysis and statistic submodule for monitoring the voltage qualified rate and a demand analysis and statistic submodule for monitoring the demand. The comprehensive operation parameter monitor for the low-voltage clients can comprehensively monitor power grid parameters such as the leakage current, the voltage qualified rate and capacity and performs prompt when the parameters exceed the standard, so that the power grid operation condition of the low-voltage clients can be mastered rapidly and accurately, and the power grid security is guaranteed.