An embodiment of the invention is suitable for the technical field of connector automatic production equipment, and provides a device for enabling a connector terminal to be inserted into a shell automatically and a processing method thereof. The device for enabling the connector terminal to be inserted into the shell automatically comprises a terminal positioning and clamping device, an X-axis linear module, a Y-axis linear module, a Z-axis linear module, a tension detection device and a shell fixation device. The X-axis linear module drives the Y-axis linear module to move in the X-axis direction; the Z-axis linear module drives the terminal positioning and clamping device to move in the Z-axis direction; the tension detection device comprises a mobile base and a slide detection device; the Y-axis linear module drives the mobile base to move in the Y-axis direction; the Z-axis linear module is arranged on the slide detection device; the slide detection device is slidably arranged on the mobile base; the slide detection device comprises a low-friction cylinder; and a piston rod of the low-friction cylinder can be extended and press against the mobile base. The device can detect the finished product automatically, and has the advantages of low labor cost and high production efficiency.