Separating/ combining selecting functional hydraulic control valve and fixed/ variable flow hydraulic system of loading machine

The invention relates to a separating/ combining selecting functional hydraulic control valve, and aims at solving the problems of energy loss and steering wobbling of the existing fixed/ variable flow hydraulic system of the loading machine. The separating/ combining selecting functional hydraulic control valve is characterized in that the left hydraulic control end and the right hydraulic control end of a second hydraulic control valve communicates with an inlet of an one-way valve through a second throttling hole and a second throttling hole, respectively; an outlet of the one-way valve communicates with a C oil port; an oil inlet of the second hydraulic control valve at the left position communicates with the C oil port through the one-way valve, and the oil inlet of the second hydraulic control valve at the right position is in one-way communication with the C oil port through the one-way valve and communicates with an oil inlet of a first hydraulic control valve; an E oil port communicates with an oil outlet of the first hydraulic control valve; the oil inlet of the first hydraulic control valve at the right position is disconnected to the oil outlet, and the oil inlet of the first hydraulic control valve at the left position is in one-way connection with the oil outlet. With the adoption of the separating/ combining selecting functional hydraulic control valve, the problem problems of energy loss and steering wobbling of the fixed/ variable flow hydraulic system of the loading machine can be solved.