The present invention relates to the technical field of prostate conserving devices and also discloses a prostate conserving device for sedentary people. The prostate conserving device comprises a fastening sliding frame, the fastening sliding frame comprises an elastic belt, a non-elastic zone, a sliding groove, a rotary clamping block and a first spring, an upper end of the fastening sliding frame is connected with an adjusting frame, first annular teeth are arranged on an outer side of the adjusting frame, a tooth row is arranged in an inner wall of an upper part of a soft belt, the tooth row is meshed and connected with a gear, one side of a rotating handle is provided with second annular teeth, and a lower end of the soft belt is respectively connected with a first soft magnetic stripand a second soft magnetic strip. An upper end of the rotary clamping block is pressed, the rotary clamping block rotates through a cylinder, the low elasticity first spring conducts fixing, a rotaryhandle drives a sliding cylinder to rotate, the sliding cylinder drives meshing of the gear and the tooth raw, and the upper end of the soft belt is fixedly provided with the adjusting frame and thefirst soft magnetic strip and the second soft magnetic strip. The prostate conserving device solves problems that existing prostate massage devices are single, relatively poor in effects and liable tomove.