Abstract: Aerodynamic drag reduction is a critical approach for technical and tactical optimization in speed skating. In this study, the pixel method was employed to measure the frontal areas of three speed skaters under different body postures and skating modes, and a fitting equation for frontal area was constructed based on anthropometric parameters. Wind tunnel tests were conducted to measure the aerodynamic drag of various formation arrangements, so as to reveal the aerodynamic interference mechanism of multi-skater formations. The results indicate that the frontal area of the arms-behind posture is 15 % lower on average than that of the arm-swinging posture; single-leg alternating skating generates lower drag than the legs-together crouched posture; increasing the lateral spacing between two skaters can reduce drag by up to 19.2 %; for the three-skater longitudinal formation, larger longitudinal spacing increases the drag of the rear two skaters by 24 % on average, and asynchronous skating raises the total drag by 27.3 % on average.