The invention relates to the field of automatic application of mechanical assembly, in particular to a full-automatic sorting and feeding mechanism for an assembling robot. The full-automatic sorting and feeding mechanism comprises an automatic sorting mechanism and an automatic feeding mechanism; the automatic sorting mechanism comprises a magnetic disk; the magnetic disk is connected with a magnetic disk rotating one-dimensional sliding platform through a rotating device; a conveying belt capable of moving forwards and backwards is arranged below the magnetic disk; storage boxes are arranged on two sides of the conveying belt; the automatic feeding mechanism comprises a rotating disk motor; the rotating disk motor is connected with a rotating disk through a cam graduator; a screw rod cylinder is arranged on the rotating disk and is connected with a screw rod motor through a synchronous belt; storage cylinders are further arranged on the rotating disk; and a guiding cylinder is arranged above the storage cylinders. The core of the feeding mechanism of the full-automatic sorting and feeding mechanism is as follows: the rotating disk form is adopted, the multiple storage cylinders are adopted, part storage and part conveying are performed simultaneously, and the efficient feeding function can be realized.