A multi-functional mobile laptop desk includes a base, on which a support member is set; the end of the support member far from the base is provided with a joint, the top of the joint is provided with a first upper arm, and the lower part of the joint is provided with a first A lower arm and a first B lower arm paralleling with the first upper arm; the end of the first upper arm far from the joint is connected with the top of a tooth tank; the ends of the first A lower arm and the first B lower arm far from the joint are connected with the lower part of the tooth tank; the top of the another end of the tooth tank is provided with a second upper arm, and the lower part of the end is provided with a second A lower arm and a second B lower arm paralleling with the second upper arm; the another end of the second upper arm far from the tooth tank is connected with the top of a connecting seat; the another ends of the second A lower arm and the second B lower arm far from the tooth tank are connected with the lower part of the connecting seat; the front of the connecting seat far from the tooth tank is provided with a moveable computer seat.