Abstract: As a new observation system， the multi-channel forward-looking bistatic SAR with Uncooperative illuminators has significant advantages such as flexibility for configuration design， wide forward-looking imaging areas， High signal-to-noise ratio in target areas， strong concealment， low cost， and convenience for deployment. This paper designs a new miniaturized multi-channel forward-looking bistatic SAR receiver with uncooperative illuminators to expand the application practice of the system， which can be implemented on ground or mini UAV platforms， and complete the integration and debugging of the principle prototype， then input frequency stepped single-frequency signals in laboratory environment and carry out the actual imaging experiment， to verify the correctness and practicality of system design.