The invention discloses a novel on-line continuous preparation profile control 
oil displacement device which comprises an incoming water decompression 
system, a disperse 
dissolution system and an 
automatic control system. The incoming water decompression system comprises a high-pressure end and a low-pressure end; the high-pressure end is connected with a 
water storage tank through a high-pressure 
water supply pipeline provided with an adjusting valve A; a 
water level indicator is arranged at the bottom of the 
water storage tank; the low-pressure end is composed of a 
centrifugal pump, a filter, an adjusting valve B and a flowmeter A which are sequentially connected through 
water supply pipelines; the disperse 
dissolution system comprises a hopper, an unloader, an airtight funnel, a 
powder air pipeline, a hydraulic jet device and a 
dissolution tank; and the 
automatic control system is composed of a 
programming module, a DCS system, an adjusting valve, 
frequency conversion equipment and a flowmeter. According to the novel on-line continuous preparation profile control 
oil displacement device, higher working condition adaptability, control stability and using safety are achieved, on-line preparation of a 
high concentration polymer solution is achieved, meanwhile, preparation processes for multiple aspects can be achieved, a wider system selective space is achieved accordingly, and the purpose of reducing system selective cost is achieved.