The hydraulic control circuit

The invention discloses a hydraulic control loop. The hydraulic control loop comprises a direction control valve (10) with a bypass throttling loop and an execution element (11) connected with the direction control valve (10), and is characterized by also comprising a valve (20), wherein the valve (20) is connected in series with the bypass throttling loop, so that the flow of hydraulic oil whichflows through the execution element (11) is kept unchanged under the condition that the flow of oil supplied to the direction control valve (10) is unchanged. By the technical scheme, the flow of thehydraulic oil which flows through the execution element can be kept unchanged by using the valve in spite of the variation conditions of loads born on the execution element under the condition that the flow of the hydraulic oil which is supplied to the direction control valve by a hydraulic pump is unchanged. Therefore, relatively stable operating speed of the execution element in the operation process can be kept, so that a stable operation state is realized.