RIC finger sleeve sealing assembly pressing device and pressing method

The invention relates to an RIC finger sleeve pipe sealing assembly pressing device and pressing method. The pressing device comprises a finger sleeve pipe for pressing, a thrust pipe section, a core pipe, a tee joint, a water pressure device and an air pressure device; the outer diameter of the hollow finger sleeve for pressing is the same as that of the actual finger sleeve, and one end of the finger sleeve for pressing penetrates through the thrust sleeve section and is fixedly connected with one end of the thrust sleeve section, so that after the actual finger sleeve and the actual thrust sleeve are detached, the finger sleeve for pressing is inserted into the sealing assembly, the actual finger sleeve is replaced, and the thrust sleeve section is locked; the core pipe is arranged in the finger sleeve for pressing in a penetrating manner, and a backflow channel is formed between the core pipe and the inner wall of the finger sleeve for pressing; the first end of the tee joint is connected with the thrust