The invention discloses a novel excavator current-limiting control system, belonging to the field of electrohydraulic control of hydraulic excavators. The novel excavator current-limiting control system comprises a master controller, a main pump proportional valve, a getting-down pressure switch S2, a getting-on pressure switch S1, and a rotation speed sensor and further comprises a revolution pilot pressure sensor, a P1-pump outlet pressure sensor, a P1-pump current-limiting pressure sensor, a P2-pump current-limiting pressure sensor, a P2-pump maximum-flow control proportional valve and a P1-pump maximum-flow control proportional valve, which are respectively and electrically connected with the master controller. The novel excavator current-limiting control system has the beneficial effects that: the flexibility in model selection of hydraulic elements can be enhanced, meanwhile, a rotary motor and a travelling motor can be prevented from being damaged by overlarge flow of a hydraulic system; in addition, the actions in need of current limitation can be judged through a detection device so as to prevent 'one size fits all' type current limitation, the pump displacement of two single pumps can be limited through controlling the current of the two current-limitation proportional valves, closed-loop control is adopted for a current control loop of the proportional valves, and thus the accurate current-lamination control is realized.