The invention relates to the technical field of abyss equipment, in particular to a flushing type abyss sediment pressure maintaining and transferring system device based on a sampling bucket. The flushing type abyss sediment pressure maintaining and transferring system device based on the sampling bucket comprises a mechanical system, the mechanical system includes a converting head, a sampling bucket body, a water receiver and a culture kettle, wherein the converting head, the sampling bucket body, the water receiver and the culture kettle are sequentially connected through high-pressure ball valves from top to bottom; a gas inlet of the culture kettle is connected with two pipelines through a three-way joint, one of the pipelines is connected with a gas storage bottle, and the pipelineis provided with a gas flowmeter; the other pipeline is connected with a vacuum pump, and the pipeline is provided with a gas control valve; a liquid inlet of a hydraulic pump is connected with a culture liquid tank through a high-pressure hose; and a water outlet is connected with two high-pressure hose pipelines through a three-way joint, and a liquid inlet of the culture kettle is connected with one of the hose pipelines. According to the flushing type abyss sediment pressure maintaining and transferring system device based on the sampling bucket, the maximum withstand voltage of the sediment pressure maintaining and transferring system device is 100 Mpa, the transferring rate can reach 100%, and the equipment guarantee is provided for the biological research of myriametre beneath the sea floor; and a sediment split charging and transfer technology provides samples for many cultivation studies, so that the complete waste, caused by a single mistake, of the samples myriametre beneaththe sea floor is avoided.