A multifunctional rubber and plastic injecting forming machine comprises a forming device (13) and an injecting device (16), wherein the forming device (13) comprises a die assembly cylinder (1), a walking beam (2), an upper die (3) and a lower die (4); the lower die (4) is matched with a sliding rail (9) arranged on a drawing die frame (8); the upper end of the die assembly cylinder (1) is connected with the walking beam (2) which is provided with a die guiding rail (5) and a lower die heating plate (6); the die guiding rail (5) corresponds to the sliding rail (9); and the side surface of the die assembly cylinder (1) is provided with a speedy hydro-cylinder (7), and a piston rod (7) of the speed hydro-cylinder (7) is connected with the walking beam (2). The rubber and plastic injecting forming machine solves the problem of serious abrasion between the lower die and the heating plate on the walking beam, guarantees the processing quality of products, and is characterized by simple structure, high working efficiency and long service life.