The tooth profile parameters of bimetal band saw blades are critical factors that influence cutting performance.A three-dimensional simulation model of a bimetallic band saw blade cutting 45^# steel was created using AdvantEdge FEM software to analyse the effect of tooth spacing parameters on the average cutting force.The results show that tooth spacing parameters significantly affect cutting force，stress distribution and tooth tip wear during bimetallic band saw blade machining.Medium teeth exhibit stress distribution on both sides with crescent-shaped wear patterns，whereas split teeth demonstrate stress concentrated towards the outer side with unilaterally distributed wear.Increasing the split amount or reducing the split height both amplify this trend.Increasing the cutting speed or decreasing the feed rate reduces the cutting volume per tooth group，thereby diminishing the overall combined force during sawing.However，this does not directly affect the proportion of the cutting volume borne by split teeth versus medium teeth.When the cutting load per tooth group remains constant （i.e. when the sawing speed and feed rate are unchanged），reducing the tooth spacing or increasing the tooth height alters the cutting load ratio between the centre tooth and the spacer teeth.This reduces the cutting load on the centre tooth while increasing the overall combined force during the sawing process.