Nanofluidic device

The invention belongs to the technical field of in-situ experiment instruments, and particularly relates to a nanofluidic device which comprises a shell, a fluid control assembly and a controller are arranged in the shell, and the output end of the controller is connected with the control input end of the fluid control assembly; wherein the fluid control assembly is provided with a flow channel switching valve, an injector and a plurality of internal flow channel interfaces; the flow channel switching valve is used for switching the internal flow channel interfaces communicated with the injector; the shell is provided with a plurality of external flow channel connectors, and different internal flow channel connectors are connected with different external flow channel connectors respectively. Different external flow channel interfaces can be used for receiving different fluid materials, and switching of the different fluid materials is carried out through the fluid control assembly; the fluid control assembly