A hydraulic control valve for a construction machine that controls hydraulic fluid supplied to an actuator, comprising: a mono type valve block; a boom spool slidingly coupled into the mono type valve block to be shifted to control the hydraulic fluid supplied from a first hydraulic pump and a second hydraulic pump to the actuator, and provided with an internal path formed in an axis direction thereof; a first supply path connectable to the first hydraulic pump and a second supply path connectable to the second hydraulic pump which are formed in the valve block; check valves (104; 108) elastically supported to open and close the first supply path of the first hydraulic pump and the second supply path of the second hydraulic pump, respectively; bridge paths (117; 119) formed to supply the hydraulic fluid from the first supply path of the first hydraulic pump and the second supply path of the second hydraulic pump to the actuator; cylinder paths (19; 24) supplying the hydraulic fluid from the first supply path to the actuator if the boom spool is shifted to make the cylinder paths (19; 24) communicate with the bridge path supplying the hydraulic fluid from the first supply path; a connection path supplying the hydraulic fluid from the second supply path to the internal path of the boom spool if the boom spool is shifted characterized in that, said connection path supplies the hydraulic fluid from the second supply path to the internal path if the boom spool is shifted to make the connection path communicate with the bridge path supplying the hydraulic fluid from the second supply path; and check valves (110; 113) elastically supported to open and close openings formed on both sides of the internal path of the boom spool, wherein the check valve (110; 113) of the opening on the cylinder path side (19; 24), to which the hydraulic fluid from the first supply path of the first hydraulic pump and the second supply path of the second hydraulic pump is supplied, is opened to supply the hydraulic fluid to the actuator, and the check valve (19; 24) of the opening on the other side is maintained in a closed state. a mono type valve block; a boom spool slidingly coupled into the mono type valve block to be shifted to control the hydraulic fluid supplied from a first hydraulic pump and a second hydraulic pump to the actuator, and provided with an internal path formed in an axis direction thereof; a first supply path connectable to the first hydraulic pump and a second supply path connectable to the second hydraulic pump which are formed in the valve block; check valves (104; 108) elastically supported to open and close the first supply path of the first hydraulic pump and the second supply path of the second hydraulic pump, respectively; bridge paths (117; 119) formed to supply the hydraulic fluid from the first supply path of the first hydraulic pump and the second supply path of the second hydraulic pump to the actuator; cylinder paths (19; 24) supplying the hydraulic fluid from the first supply path to the actuator if the boom spool is shifted to make the cylinder paths (19; 24) communicate with the bridge path supplying the hydraulic fluid from the first supply path; a connection path supplying the hydraulic fluid from the second supply path to the internal path of the boom spool if the boom spool is shifted characterized in that, said connection path supplies the hydraulic fluid from the second supply path to the internal path if the boom spool is shifted to make the connection path communicate with the bridge path supplying the hydraulic fluid from the second supply path; and check valves (110; 113) elastically supported to open and close openings formed on both sides of the internal path of the boom spool, wherein the check valve (110; 113) of the opening on the cylinder path side (19; 24), to which the hydraulic fluid from the first supply path of the first hydraulic pump and the second supply path of the second hydraulic pump is supplied, is opened to supply the hydraulic fluid to the actuator, and the check valve (19; 24) of the opening on the other side is maintained in a closed state.