The invention discloses a coating stirring device with high stirring efficiency. Two support blocks are arranged at the lower end of a substrate; a lower stirring bucket is arranged inside a through hole of the substrate through a support base; a rotating motor is arranged inside the support base; the rotating shaft of the rotating motor penetrates out the lower stirring bucket and is connected with a rotating rod inside the lower stirring bucket; a plurality of stirring blades are arranged on the rotating rod; an upper stirring bucket matched with the lower stirring bucket is arranged above the lower stirring bucket; lifting components positioned on the substrate are arranged at two ends of the upper stirring bucket; a bearing block is arranged at the lower end inside the upper stirring bucket; a first rotating block and a second rotating block which can be rotated are respectively arranged on two sides of the lower part of the bearing block; motors are arranged at front ends of the first rotating block and the second rotating block; a plurality of stirring rods arranged in parallel are arranged on rotating shafts of the motors; a first cylinder and a second cylinder are arranged at the lower end inside the upper stirring bucket; the first cylinder and the second cylinder are respectively connected with the first rotating block and the second rotating block. The coating stirring device is capable of stirring a coating sufficiently, and meanwhile is good in sealing property in stirring.