In order to analyze the faraway non-cooperative target, the research of faraway non-cooperative target ranging experiment is proceeded by using multi-pixel photon counter (MPPC) where photon counting laser ranging method and pulse ranging method is combined. Weak signal reflected by faraway non-cooperative target MPPC is simulated in the laboratory. By analyzing the return photons which are detected by MPPC, the distribution of photons reflected from the target is studied. The interval of start and stop pulses is calculated with different algorithms, and the influence of these algorithms on the ranging result is analyzed. 7220 pulses have been obtained by MPPC, 4 GHz sample rate oscillograph and pulsed laser with 5 ns pulse width. The statistic results prove that the return signals obey Poisson distribution. The optimal ranging result has been obtained by constant fraction discrimination method: the deviation of ranging result and measured distance is 2.8 cm, the weighted standard deviation is 0.9 cm, and the ranging result deviation obtained by constant amplitude method and autocorrelation method are both over 40 cm. The reasons why different methods do not produce the same results are given by comparing the constant fraction discrimination method with other algorithms.