Abstract: This paper analyzed in detail the sedimentary environment of Middle-Lower Jurassic in Turpan-Hamibasin by dissection of sporopolla assemblage characters in coal measure strata,structures of fossil wood and plant re-mains along with study of some special geologic phenomena such as bio-trace fossils,clay minerals and trace elements,etc. and classified coal swamp organic phase based on sedimentary environment of Shuixigou group coal measure strataand classification. Studies showed that the climate of Early-Middle Jurassic in Turpan-Hami basin belongs to subtropicwarm humid climate; sedimentary environment is dominated by shallow river swamp and lake swamp; water is by freshwater with a little acid. The sedimentary environment of coal swamp can be classified into eight types and four organicphases.