An operational circuit of a virtual currency data processing device includes: at least two operational chip groups configured to operate within respective operating voltage threshold ranges of the operational chip groups to receive a communication signal which includes an issued task, perform calculations according to the issued task, and transmit a communication signal; a control module configured to operate within an operating voltage threshold range to transmit the communication signal which includes the issued task and receive the communication signal which includes the calculation result; at least two signal forwarding and electrical isolation modules, each of which is communicatively connected to and is configured to forward communication signals between the control module and the respective operational chip group, and isolate an operating voltage threshold of the operational chip groups to make the operational chip groups and the control module capable of identifying communication signals sent by each other.