Pluggable multifunctional mobile financial terminal and port number fixing method of pluggable multifunctional mobile financial terminal

The invention discloses a pluggable multifunctional mobile financial terminal which comprises a tablet personal computer and a base connected with the tablet personal computer in a pluggable mode. The base is electrically connected with the tablet personal computer through a base connecting plate, the base connecting plate comprises a USBHUB with a plurality of USB interfaces and a small base control plate, the small base control plate is provided with a HUB chip, the HUB chip enables USB signals coming from the USBHUB to be spread into a plurality of RS232 serial port signals to be connected with corresponding RS232 interfaces through serial port data signal sending/receiving buses, financial card machine and tool modules are integrated on the base, in the state that the tablet personal computer and the state are disconnected, the tablet personal computer independently works, and in the state that the tablet personal computer is connected with the base, the base supplies power to the tablet personal computer through the base connecting plate. By means of the pluggable multifunctional mobile financial terminal, hot plug of the tablet personal computer can be achieved, meanwhile, the serial-port port number is fixed for the same tablet personal computer, and the multi-scenario application of the financial terminal is achieved.