Externally-arranged data processing device

The utility model discloses an externally-arranged data processing device which comprises an easily-dismounted shell body, a circuit board, a central processing unit (CPU), a storage unit, a power interface and a universal serial bus (USB) interface. The circuit board, the CPU and the storage unit are arranged in the shell body. The power interface and the USB interface are arranged on the shell body. The CPU and the storage unit are all arranged on the circuit board. The power interface and the USB interface are respectively connected with the circuit board. The externally-arranged data processing device has the advantages of enhancing data processing capability of a terminal device, being capable of replacing an internally-embedded CPU device step by step, saving upgrading cost of a machine, greatly avoiding resource waste and avoiding repetitive production, purchase and use. The externally-arranged data processing device is capable of being connected with various desktop computers, notebooks and mobile pho