The utility model discloses an electric static bidirectional remolded soil sample preparation instrument, and belongs to the technical field of geotechnical engineering. The electric static bidirectional remolded soil sample preparation instrument is composed of a sample accommodating mold and a transmission mechanism, wherein the sample accommodating mold which is composed of a saturator, a cutting ring and a split sleeve not only can control different dimensions of test samples but also can directly push soil into the saturator, so as to avoid disturbance on the test samples in a demoulding process; by virtue of the transmission mechanism which is composed of such accessories as a press head, a press plate, a screw rod, a worm gear, a worm and a limiter, the height of the test sample is precisely controlled and the test sample prepared by uniformly pressing the sample through static force in a bidirectional manner is uniform in overall density; and the working efficiency is improved; under assistance of the limiter, the sample preparation instrument not only precisely realizes preset dimension of the test sample but also guarantees safety of a testing process. The instrument is convenient to use and simple in structure, and is capable of meeting a demand of rapidly preparing a remolded soil sample on dimension in accordance with the national standard and guaranteeing safety in a sample preparation process.