Abstract: The compressive strength is one of important mechanical characteristics of sea ice. The compnessive
 strength of sea ice is sampled and tested during the winter of 2014~2015 in Liaohe Estuary. The experiments conclude uniaxial compressive strength test, confined comfressive strength test and uniaxial compressive strength test
 on the ice specimens from different dimensions. The experiment shows that the strength of sea ice is significantly affected by strain rate and brine volume. The confined compressive strength of ice is slightly larger than that of the u
niaxial compressive strength. Under the same strain rate, the compressive strength of the sample is not different ob
viously and the size effect of the specimen is not important.