The invention discloses a hydraulic power device, which comprises a machine frame, a motor, a lead screw nut pair composed of a turn-screw and a lead screw nut sleeved at the turn-screw, a first hydraulic cylinder whose of which a first cylinder body is fixedly connected to the machine frame; , and a control valve group connected to the first hydraulic cylinder, wherein the lead screw nut pair and the motor are connected to the upper end of the turn-screw; the lead screw nut pair is connected with the a first piston of the first hydraulic cylinder through the lead screw nut; an upper oil suction and an upper oil outlet are arranged on the top part of the first cylinder body of the first hydraulic cylinder; and the bottom of the first cylinder body is provided with a lower oil suction and a lower oil outlet. Compared with the prior art that adopts an oil pump as the power device, the hydraulic power device in disclosed by the invention is higher in working efficiency and smaller in noise. The invention further provides a tester including the hydraulic power device.