The invention relates to an automatic front feeding device. The automatic front feeding device comprises a fixed base installed on a moving table of a machine tool, wherein a supporting base is installed in the fixed base, a front leaked-material baffle and a rear leaked-material baffle are arranged on the front side and the rear side of the upper surface of the fixed base respectively, a front blocking strip and a rear blocking strip are installed between the front leaked-material baffle and the rear leaked-material baffle, a workpiece is loaded by the front blocking strip and the rear blocking strip, inverted-V-shaped grooves are formed in the bottom of the front blocking strip and the bottom of the rear blocking strip respectively, a first workpiece position is formed above the supporting base, one workpiece can pass through the first workpiece position, fixing plates are installed on the two sides of the fixed base respectively, an air cylinder base is arranged on the inner sides of the fixing plates, an air cylinder is installed in the middle of the air cylinder base, and a push rod of the air cylinder exactly faces the first workpiece position. According to the automatic front feeding device, full-automatic feeding and clamping of short materials and granular materials are achieved, dozens of workpieces can be loaded on the automatic front feeding device at one time, a plurality of machine tools can be operated by one person at the same time, rapid line connection machining is facilitated, and machining efficiency is greatly improved; meanwhile, the automatic front feeding device is small in occupied space, simple in structure, convenient to control, stable in operation and wide in range of application.