The invention discloses an inner pin wire welding encapsulation method of a plug-in magnetic component, and relates to the technical field of the manufacturing of the magnetic components. The method comprises the following steps: pre-winding a magnetic coil of an enameled wire of the plug-in magnetic component, twisting a grouped enameled lead wire of the magnetic coil on an inner pin of a gluey shell to fix, and then cladding the magnetic coil through the resin, and initially encapsulating and fixing with the gluey shell, and meanwhile, leaving a certain length on the inner pin; synchronously removing paint and welding the inner pin and the twisted enameled wire, overturning, and then plating tin on an outer pin; cleaning, drying; checking and testing; and finally encapsulating, printing code and packaging. Through the adoption of the method disclosed by the invention, the production process of the plug-in magnetic component is simplified, the manufacturing flow is shortened, the automatic continuous production can be easily realized, the production efficiency is high, the yield is high, and the production cost is low.