The invention discloses a heavy-duty self-discharging dry-mixed mortar bulk silo transport vehicle, relates to heavy-duty self-discharging bulk material transport equipment and aims to mainly solve the problem that dry-mixed mortar is isolated and cannot be shouldered automatically in the using process of the conventional self-discharging dry-mixed mortar bulk silo transport vehicle. The transport vehicle comprises a transport vehicle body, an auxiliary frame, a turning frame, an elevating frame and a flashboard device, wherein a back support device is arranged below the tail part of the auxiliary frame; the lower part of the turning frame is provided with a jacking device; four corners of the elevating frame are provided with guide wheels; the flashboard device comprises a left flashboard and a right flashboard which are fixed on the elevating frame respectively; a spring is arranged between the left and right flashboards; the two ends of the spring are provided with guy ropes respectively; the guy ropes are fixed on the inner sides of the left and right flashboards; and limiting blocks are arranged between a guy rope and the left flashboard as well as between a guy rope and the right flashboard and are fixed on the elevating frame. The transport vehicle has the advantages of saving construction cost for a user, improving construction efficiency, reducing middle operation steps and greatly enhancing the use quality of the dry-mixed mortar.