The invention discloses a function switching device and method of a pointer type satellite positioning watch. The device comprises a main control MCU installed on a PCB, the main control MCU is electrically connected with a plurality of functional modules, a power module provides power for the main control MCU, the main control MCU is respectively electrically connected with a plurality of motors and respectively controls movement of the motors, the motor movement is transmitted to a pointer through a mechanical transmission gear train, and keys are electrically connected with the main control MCU. The switching method includes: pressing the keys to trigger the main control MCU, activating or deactivating the function, and entering a time display mode. The beneficial effect is that: the pointer is used to replace the existing liquid crystal screen display, and the defect that the positioning information cannot be displayed normally is overcome, so that the use of the satellite positioning watch is more extensive, meanwhile, various functions can be successfully opened, closed and switched through the keys, and the use is convenient.