The invention discloses an electricity-generating-type wheel edge retarding device of a hillside orchard transport cart. The electricity-generating-type wheel edge retarding device comprises a base plate, a base, a rotary shaft, a transmission mechanism, a retarding disc, an electric generator and an electromagnetic resistance mechanism; the electric generator is installed at one end of the base plate, and the electromagnetic resistance mechanism is s installed at the other end of the base plate; the base is fixed to the base plate and located between the electric generator and the electromagnetic resistance mechanism; the retarding disc is installed on the base through the rotary shaft and connected with a power output shaft of the electric generator through the transmission mechanism; and the retarding disc and the electric generator are both connected with the electromagnetic resistance mechanism. The whole retarding device is small in size, low in weight, simple in structure and convenient to install, and meets the requirements for cart lightening and simplification; and meanwhile the good retarding effect is achieved, the loss of a transport cart brake can be effectively reduced, and the service life of the brake is prolonged accordingly.