The AMESim simulation model of a doubledirection hydrauliclock was established. The influences of the hydrauliclock spool reset spring stiffness to the dynamic and static characteristics of doubledirection hydrauliclock and lock hydraulic circuit under hydraulic cylinder load were simulated. Results show that during pressure lock, hydraulic cylinder of impact of, different hydrauliclock spool reset spring stiffness impacts the valve lock orifice size, and then affecting the hydraulic cylinder glide quantity. This research provides a theoretical basis for the design of the doubledirection hydrauliclock and parameter match of locking hydraulic circuit.