The invention discloses an electrical joint control braking system for a lifting axle of a commercial vehicle. The electrical joint control braking system comprises a lifting control gas circuit and a braking control gas circuit; a bearing airbag is connected with a relay valve for the bearing air bag; the relay valve for the bearing air bag is divided into two branches; one branch is connected with a gas holder for a suspension; the other branch is connected with the gas holder for the suspension through a three-position and five-way electromagnetic valve and a pressure regulating valve in sequence; a lifting airbag is also connected with the gas holder for the suspension through the three-position and five-way electromagnetic valve and the pressure regulating valve in sequence; a braking air chamber is connected with a relay valve for braking; the relay valve for braking is also divided into two branches; one branch is directly connected with a gas holder for driving; the other branch is connected with an upper chamber of a braking foot valve through a two-position and three-way electromagnetic valve; and a switch is separately connected onto the three-position and five-way electromagnetic valve and the two-position and three-way electromagnetic valve. The electrical joint control braking system is reliable and simple in lifting and braking and low in cost; and no braking of the lifting axle in an elevating state, and normal braking of the lifting axle in descending and bearing states are guaranteed.