The invention relates to a music box with built-in jumping dolls. The music box comprises a music box main body, a handle, a front door, side doors, a bottom frame, two built-in sound control mechanisms and the jumping dolls, wherein the side doors are arranged on the inner sides of side holes of the music box main body through hinges to cover the side holes; two door bodies of the front door are arranged on the upper and lower sides of a front hole of the music box main body through hinges to cover the front hole; two side double-head jumping dolls and a main jumping doll are arranged in the music box main body; a tail rod of the Z-shaped handle passes through a side hole in the music box main body; the two built-in sound control mechanisms are arranged on the two sides of the bottom of the Z-shaped handle; transmission gears of rotary pushing members of the two built-in sound control mechanisms are positioned on the same straight line; transmission threads of the Z-shaped handle are meshed with the transmission gears of the rotary pushing members of the two built-in sound control mechanisms simultaneously; and the built-in sound control mechanisms are arranged in the music box main body through a bracket of the bottom frame. The music box can play music while the handle is rotated, and the dolls can jump from three directions after the music is stopped, so playability is extremely high.