Provided is a keg float radial plunger pump with dual rows of plungers and achieving variable through servo motor driving. The pump comprises a flow distribution shaft supported in a transmission shaft through a bearing. The two ends of the transmission shaft are supported on a left side cover and a right side cover through bearings correspondingly, and the left side cover and the right side cover are supported through a supporting ring and connected through a plurality of bolt sets. The two rows of plungers are fixed to the transmission shaft and matched with keg float sliding shoes. The keg float sliding shoes are fixed in holes of eccentric rings through bearings, and the two eccentric rings are connected in a pump shell side by side. The lower ends of the two eccentric rings are connected to an eccentric ring supporting shaft, and the upper ends of the eccentric rings are hinged to sliding blocks through moving shafts. Each sliding block is connected with a corresponding upper sliding block which is connected with a first ball screw. The ball screws are connected with a servo motor through a belt pulley. According to the keg float radial plunger pump, wear to the sliding shoes is reduced, the ball screws are matched with the sliding blocks and driven by the servo motor to rotate, and control over the variable of the pump is completed; and the variable implementation process is simple, reliability is high, and the response speed is high.