A control method for a pump truck, characterized by comprising: Acquiring degrees of opening of four outriggers (1, 2) of the pump truck, acquiring degrees of opening of four outriggers of the pump truck, wherein the degrees of opening are measured by an outrigger sensor in real time; determining end points of the four outriggers (1, 2) of the pump truck according to the degrees of opening and connecting the end points of the four outriggers (1, 2) to determine boundary of safe operating area of the pump truck; calculating metacentre of the whole pump truck according to the gravity of the base of the pump truck, the coordinates of the center of gravity of the base and the gravity of the whole pump truck; calculating the center of gravity of the whole pump truck according to the gravity of the base of the pump truck, the gravity of the boom of the pump truck, the gravity of the whole pump truck, the coordinates of the center of gravity of the boom of the pump truck and the coordinates of the center of gravity of the base of the pump truck; calculating a safety coefficient of the pump truck according to the boundary of the safe operating area, the metacentre of the whole pump truck and the center of gravity of the whole pump truck; and controlling the pump truck according to the safety coefficient; the metacenter of the whole pump truck is calculated by the following formulas: X stab = G truck ∗ x truck / G total Y stab = G truck ∗ y truck / G total wherein X stab is x-coordinate of the metacenter of the whole pump truck, Y stab is y-coordinate of the metacenter of the whole pump truck, G truck is the gravity of the base, G total is the gravity of the whole pump truck and (x truck, y truck) are the coordinates of the center of gravity of the base; wherein, the gravity of the base, the gravity of the whole pump truck are inherent parameters of the pump truck; controlling the pump truck according to the safety coefficient comprises: controlling the pump truck to lock an action of the pump truck according to the safety coefficient; controlling the pump truck to implement an opposite action of a locked action; and controlling the pump truck to unlock the locked action. Acquiring degrees of opening of four outriggers (1, 2) of the pump truck, acquiring degrees of opening of four outriggers of the pump truck, wherein the degrees of opening are measured by an outrigger sensor in real time; determining end points of the four outriggers (1, 2) of the pump truck according to the degrees of opening and connecting the end points of the four outriggers (1, 2) to determine boundary of safe operating area of the pump truck; calculating metacentre of the whole pump truck according to the gravity of the base of the pump truck, the coordinates of the center of gravity of the base and the gravity of the whole pump truck; calculating the center of gravity of the whole pump truck according to the gravity of the base of the pump truck, the gravity of the boom of the pump truck, the gravity of the whole pump truck, the coordinates of the center of gravity of the boom of the pump truck and the coordinates of the center of gravity of the base of the pump truck; calculating a safety coefficient of the pump truck according to the boundary of the safe operating area, the metacentre of the whole pump truck and the center of gravity of the whole pump truck; and controlling the pump truck according to the safety coefficient; the metacenter of the whole pump truck is calculated by the following formulas: X stab = G truck ∗ x truck / G total Y stab = G truck ∗ y truck / G total wherein X stab is x-coordinate of the metacenter of the whole pump truck, Y stab is y-coordinate of the metacenter of the whole pump truck, G truck is the gravity of the base, G total is the gravity of the whole pump truck and (x truck, y truck) are the coordinates of the center of gravity of the base; wherein, the gravity of the base, the gravity of the whole pump truck are inherent parameters of the pump truck; controlling the pump truck according to the safety coefficient comprises: controlling the pump truck to lock an action of the pump truck according to the safety coefficient; controlling the pump truck to implement an opposite action of a locked action; and controlling the pump truck to unlock the locked action. controlling the pump truck to lock an action of the pump truck according to the safety coefficient; controlling the pump truck to implement an opposite action of a locked action; and controlling the pump truck to unlock the locked action.