Spiral universal throttling valve with bidirectional flow regulating function

The invention discloses a spiral universal throttling valve with a bidirectional flow regulating function and relates to a flow regulating valve in the field of ventilation air conditioning, heating and ventilation. The spiral universal throttling valve with the bidirectional flow regulating function comprises a valve body assembly and a valve spool assembly, wherein the valve spool assembly is arranged in the valve body assembly, the valve body assembly is in clearance fit with the valve spool assembly, the valve spool assembly can freely slide in the valve body assembly, filter screens are arranged at the two ends of the valve body assembly, a length adjusting device I is additionally arranged on the valve body assembly, and a length adjusting device II is arranged on the valve spool assembly. The spiral universal throttling valve with the bidirectional flow regulating function can realize free movement of the valve spool in the valve body, overcomes the defects that the bidirectional throttling valve is easily worn, the flow cannot be freely regulated and the valve body and the valve spool cannot be changed according to the demands, and has the advantages of low manufacturing cost, convenience in flow regulation and long service life.