Sofa with lifting function

The invention discloses a sofa with a lifting function, relates to the technical field of sofas, and solves the problems that when the sofa is used, a cushion is generally difficult to independently lift and incline, so that a person is difficult to lean against the cushion and lie on the sofa for rest, and the length of the sofa is difficult to adjust according to the requirements of the person. And the teacup is difficult to effectively place when people have a rest. The sofa with the lifting function comprises a sofa base, sofa back cushions are movably installed at the positions, close to the rear side, of the top end of the sofa base, and sofa seat cushions are movably installed at the top end of the sofa base. Through cooperation of the base side grooves and the base outer connecting rods, when the device is used, the base outer connecting rods can be clamped into the base side grooves, so that the device can assemble a plurality of sofa bases, sofa back cushions and sofa seat cushions, the overall leng