Automobile tail door supporting method capable of realizing manual and electrical switching and automobile tail door supporting rod

The invention discloses an automobile tail door supporting method capable of realizing manual and electrical switching. The automobile tail door supporting method comprises the following steps: (1) manufacturing an automobile tail door supporting rod which comprises an outer supporting rod, an inner supporting rod and a transmission mechanism, wherein the inner supporting rod is inserted into the outer supporting rod, and the transmission mechanism is provided with a motor and a threaded rod; the automobile tail door supporting rod further comprises a manual and electric switching mechanism which is arranged at the bottom of the inner supporting rod and comprises a clamping seat, an electromagnetic coil, a spring, a snap ring and a snap joint; (2) when the electromagnetic coil is powered on, forming a thread screw, and considering the inner supporting rod and the outer supporting rod as electric supporting rods driven by the motor to realize electric opening or closing of an automobile tail door; (3) when the