The slaking stability of an excavated high slope of argillaceaus soft rock is systemmically studied. Based on dr laboraccyry resulrs of undisnnbed sample, the special mechanical characterisrics are analyzed.m Bishop's circular arc amalysis is used to cakulare tle overall sabilky of slope in the ntUural state, residual shear srrength swe, as well as slaking state. According to the coefficients of Duncan maddgained by labora-tory tests,the nonlinear srress-srrain chamcteristics of the excavated high sjope under different gress state is studied by fmke elemai mehod.moreover, strengthprenl clnn p iS calculated nrvvl nnnkrn-d us; no hnmnlnaniis model and coeffioents. The results reveal that it is iclentical with the sl-ope in the real starJe. The conclusion can be drawn that the grengthattenuation due to rainfall infiHration tmd deconlrcssionrealxation mustk tak-en into accoum in rne aesigll and anaiysis of argiiiaceaus son ROCK siope.