A wide dynamic range linear measurement system of silicon detector is introduced. The system is based on flux addition, which controls the LEDs to turn on, off and the collector to collect data through time logic. In the adjustment range of LED injection current of 2.2×10 -6-0.57 A, nearly nine orders linearity of silicon detector response current within the range of 3.92×10 -11-10 -2 A is calibrated. The experimental results show that the error introduced by the nonlinearity of the detector can reach 0.23% when the silicon detector is measuring in the dynamic range of nine orders and it is necessary to correct the measured value by the nonlinearity correction factor. In the end, a nonlinearity correction factor is given, ranging from 1 to 1.0023. The measurement uncertainty of the measurement results is analyzed, and the factors that affect the measurement accuracy of the system are listed. The influence of the spectral drift of the LED light source on the measurement accuracy of the system is analyzed quantitatively. The measurement uncertainties are 0.269%, 0.0116%, 0.00536% and 0.00320%, when the response current ranges of the silicon detector are 39.2 pA-0.326 nA, 0.326-81.6 nA, 81.6 nA-20.4 μA and 20.4 μA-10.2 mA respectively. The result shows that the system can be used in wide dynamic range response of high accuracy silicon detectors.