An intermittent lifting assembly, configured to drive a heat dissipation panel of the mobile terminal to open and close. The intermittent lifting assembly includes: a first driving piece that includes a first intermittent gear and a convex shoulder disposed on the first intermittent gear; a second driving piece that includes a second intermittent gear engaged with the first intermittent gear, where a position-limiting slot is disposed on the second intermittent gear, the position-limiting slot is configured to limit a position in which the convex shoulder rolls when teeth of the first intermittent gear and teeth of the second intermittent gear are out of an engaged state; and a gap for avoiding the second intermittent gear is disposed on the convex shoulder; and further includes a swing rod that is fastened to the second intermittent gear and configured to drive the heat dissipation panel to open or close.