The invention discloses an electrostrictive micromotion structure for improving the two-axis rotating table tracking precision and a control method thereof. The electrostrictive micromotion structure comprises a pitching base and a rotary base, wherein a support shaft is arranged between the pitching base and the rotary base; one end of the support shaft is fixed in the center position of the pitching base; the other end of the support shaft is provided with a rolling bearing; the rolling bearing is arranged in the center position of the rotary base; a pitching electrostrictive element used for controlling the pitching base to perform pitching regulation is arranged on the pitching base; a rotary electrostrictive element used for controlling the rotary base to perform rotation around the center is arranged on the rotary base. The electrostrictive micromotion structure has the advantages that the structure is simple; the method is simple; the implementation is easy; the precise regulation on the rotary angle and the pitching angle of the two-axis tracking rotating table can be realized; the view axis precision can reach the angle second range; in addition, the precision regulation is controllable.