Equipment for improving descending controllability of movable arm of excavator

The utility model discloses equipment for improving the descending controllability of a movable arm of an excavator, and relates to the technical field of excavators, in particular to equipment for improving the descending controllability of the movable arm of the excavator, which comprises a valve body, two connecting ports, a first oil conveying port, a cavity, a valve core component, a spring, a valve seat and a second oil conveying port. A plurality of V-shaped and U-shaped throttling grooves are formed in a valve element in the throttling valve, the descending controllability of a movable arm of the excavator is improved, flow control can be carried out on hydraulic oil passing through the interior of the throttling valve, the throttling grooves are changed into the V-shaped and U-shaped throttling grooves, the micro-control performance is enhanced, and the problem that in the prior art, the throttling grooves are not prone to falling is solved. At present, valve element openings of core opening throttli