The motive power of the Party’s mass line must be deeply studied and carried out in order to make the mass line implemented in all activities of state affairs management and policymaking and to realize longterm mechanism for the mass line, therefore, the intrinsic power is needed to carry out the mass line. This paper systematically analyzes the motive factors and resistant factors to carry out the mass line from the viewpoint of Marx Demand Theory and systematically proposes the suggestions for how to activate the motive power to implement the mass line such as satisfying the demand system to seek the maximum common divisor to carry out the mass line and to enhance the intrinsic power, and reform and innovation to decrease the impediment for implementing the mass line by eliminating path dependence as well as forming the cooperative force to carry out the mass line by strengthening education and guidance and by agglomerating extensive consensus.