Abstract: Due to narrow and small space and limited bearing capacity on offshore platform,a new polymer dissolution technology,on-line curing,is put forward that dissolution velocity can be greatly accelerated by increasing specific surface area of polymer swelling-particles.According to the theory of enforced swelling-particles cutting,a set of on-line curing experimental installation has been designed and manufactured.The influence of different kinds of factors,such as size of filter screen,times of cyclic filtrating,pre-swelling time of AP-P4,flow rate of pump,mode of combining filter screen and static mixer and concentration of AP-P4,have been studied in field experiments.Experimental results shows that on-line curing technology can make AP-P4 completely dissolve in pipeline within 35min while abolishing curing-tank thoroughly.It has been proved that the on-line curing technology can simplify process of preparing polymer,shorten dissolution time greatly and decrease bearing capacity of platform effectively and it is feasible for off-shore polymer flooding.