Disclosed are a terminal device and a method for realizing an analogue circuit in the terminal device. The terminal device includes control device and programmable analogue circuit device. The control device includes: acquisition module, configured to acquire the configuration data information corresponding to the function index and the parameter index of a target analogue circuit, wherein the configuration data information is configured to indicate the on/off state of an interconnection switch between CABs; downloading module, configured to download the configuration data information to the programmable analogue circuit device; and restart module, configured to restart the programmable analogue circuit device. The programmable analogue circuit device includes: a configurable analogue array module, configured to configure the parameters and/or the connection relationship of the CABs by using the configuration data information. The disclosure enhances the fault tolerance of the system, and improves the resource utilization rate.