To reveal the influencing mechanism of curing temperature on the strength properties of solidified dredged silt,the dredged silt was solidified with soda residue, ground granulated blast furnace slag and carbide slag. Unconfined compressive strength (UCS), California bearing ratio (CBR) and triaxial compressive tests were conducted to investigate the strength properties of solidified silt. The microstructural mechanism was discussed based on X-ray diffraction and scanning electron microscopy. The results show that the relationship between the UCS of solidified silt and curing temperature can be described by an exponential function. The UCS of solidified silt increases significantly when the curing temperature increases from 35℃ to 50℃ and the UCS ratio between 50℃ and 20℃ varies from 2.4 to 6.8. The curing temperature and time have more significant influence on the strength of solidified silt with low water content. For the solidified silt with an initial water content of 44%, the increase of CBR with curing time is significant at high curing temperature, and its value meets the minimum CBR requirement for highway and primary road base. When the curing temperature increases from 20℃ to 50℃, the stress-strain curve of the solidified silt changes from strain-softening to strain-hardening. The ratio of cohesion for the solidified silt at 50℃ to 20℃ varies from 3.8 to 8.4, and the friction angle ratio varies from 1.1 to 1.2. With the increase of curing temperature, the hydration products such as calcium chloroaluminate hydrates and calcium silicate hydrate increase, and the particle agglomeration phenomenon is more significant, leading to the strength increase of the solidified dredged silt.