Efficient rotary evaporator

The utility model provides an efficient rotary evaporator, and relates to the technical field of rotary evaporators, the efficient rotary evaporator comprises a distillation flask body and a heating kettle, the right side surface of the heating kettle is fixedly connected with a water storage tank, and one side surfaces, far away from each other, of the heating kettle and the water storage tank are fixedly connected with brackets; when the water level in the heating pot is lowered, through cooperative arrangement of elastic reset pieces, a floating plate moves downwards, the floating plate moves to drive a lifting plate to move downwards through a first connecting rod, and the lifting plate moves to drive a sealing plate to move through a second connecting rod; when the sealing plate moves, water is squeezed to enter the water conveying pipe from the bottom end of the water conveying pipe, is discharged from the other end of the water conveying pipe, flows into the heating kettle and flows into the heating ke