We propose a laser-electron collision scenario based on a laser-driven micro-channel-plasma target. In this unique geometry, electrons accelerated within a solid density channel can collide head-on with the laser reflected from a foil attached onto the rear of the tube structure. The micro-channel plasma target resolves the alignment and time synchronization challenges for laser-electron colliding scenarios involving two light/electron beams. We perform simulations that predict that a single 5 PW laser is sufficient to make the radiation-reaction (RR) effect measurable. These results suggest a promising route to facilitate RR measurement, nonlinear Compton scattering gamma-ray sources and nonlinear Breit–Wheeler pair production in upcoming 10 PW level laser systems.