The invention discloses a continuous extrusion method for a lead frame material of a shallow wheel trough. The continuous extrusion method comprises the following steps that (a) billets are pressed into a shallow wheel trough extrusion wheel by a shallow wheel trough compaction wheel; (b) the billets pressed into the shallow wheel trough extrusion wheel rotate with the shallow wheel trough extrusion wheel and are subjected to plastic deformation under the driving of a fraction force; (c) after forwards moving to a shallow wheel trough baffling block, the billets enter a shallow wheel trough cavity through a shallow wheel trough cavity inlet and are subjected to expansion deformation; (d) after being subjected to the expansion deformation, the billets are extruded through a mold in the shallow wheel trough cavity, so as to form a product. The continuous extrusion method and an extrusion tool for the lead frame material of the shallow wheel trough have the advantages that the service life of the mold is prolonged, and meanwhile, due to the decrease of the difficulty of the expansion deformation, deformed metal can rapidly enter the cavity and can be rapidly extruded from the mold, so that the production energy consumption of the unit product is reduced; secondly, a shallow wheel trough extrusion device with the same main shaft diameter can be used for producing products having larger widths and sections.