A sliding hinge includes a base body, a sliding body slidably coupled with the base body, and a pushing component placed between the base body and the sliding body and having a torsion spring and a swinging arm. The torsion spring has a first elastic arm with a free end thereof pivotably connected to the base body, and a second elastic arm. The swinging arm defines a first end pivotably connected to the base body and a second end pivotably connected with a free end of the second elastic arm, and has a portion adjacent to the first end pivotably connected with the sliding body. The sliding body is pushed to bring the swinging arm to oscillate so that the second elastic arm can approach the first elastic arm for storing an elastic force which will be subsequently released to drive the swinging arm to make the sliding body slide automatically.