Abstract: Deformation of surrounding rocks of the carbonaceous rock tunnel is characterized by large magnitude, rapidity, long duration, large disturbance and creep, which is a key technical problem encountered during construction of the carbonaceous rock tunnels. Based on the statistical basis of displacement and temperature variation of the carbonaceous surrounding rocks of Guangxi Hechi-Baise expressway tunnels, a function relationship between temperature and time is established and the Weertman creep model is introduced, the creep characteristics of surrounding rocks is studied from the perspective of mechanism under the correlationof temperature and time, and the mechanism and development law of creep of the carbonaceous surrounding rocks are revealed. The results show that by using the improved Weertman model it can effectively calculate, analyze and predict the creep development law of carbonaceous surrounding rocks under the correlation of temperature and time without considering the osmotic pressure.