The soil retaining device for
hydraulic engineering construction comprises a first
butt joint plate, the first
butt joint plate is installed on the side face of a bottom plate through a first installation mechanism, and the first installation mechanism comprises a first plate body, a
threaded rod, a transverse shaft, a movable block, a connecting rod, a second plate body and a third plate body; the rotating mechanism is installed on the surface of the bottom plate, and the rotating mechanism comprises a
rotating disc, a vertical shaft, a first
bevel gear and a second
bevel gear; the second
butt joint plate is installed on the side face of the baffle through a second installation mechanism, the second installation mechanism comprises a supporting base, a stud, a sliding block, a fourth plate body, a fifth plate body and a rotating block, and the auxiliary block is fixedly installed on the side face of the second butt joint plate. According to the soil retaining device, the overall stability after the multiple soil retaining devices are installed can be improved, displacement is not prone to occurring, the plugging blocks can be plugged in gaps between the adjacent baffles, and the overall soil retaining effect after the multiple soil retaining devices are installed can be improved.