In Korea, rumen fluid-pepsin (RFP) technique has been accepted for the determination of dry matter digestibility (DMD) of forages, however, little information concerning pepsincellulase (PC) technique has been available. To test PC as a replacement for REP, we estimated DMD of Robinia pseudo acacia, Lespedeza bicolor and Puereria thunbergiana grown in Korean mountainous area by both PC and REP. The materials were seperated into leaf and stem samples, and they were dried at 80℃ for 24 hr and ground to pass a 1-㎜ screen. The DMD of the samples were determined using PC by McLeod and Minson and RFP by Minson and McLead. The results are summarized as follows: In PC the DMD of leaves of Robinia pseudo acacia, Lespedeza bicolor and Pueraria thunbergiana were 49.0%, 49.8% and 63.1%, and the DMD of their stems were 46.6%, 25.2% and 43.8% respectively. In RFP the DMD of leaves of the samples were 48.9%, 54.4% and 65.9%, and the DMD of their stems were 53.0%, 32.7% and 51.5% respectively. Regression equation and correlation coefficients between DMD by RFP (Y) and DMD by PC(X) were Y=11.65+0.85X and r=0.97 (P$lt;0.01). Regression equation and correlation coefficients between DMD(Y) and lignin content(X) were Y=90.00-4.14X and r= -9.99 (P$lt;0.01) in PC, Y=89.33-3.62X and r=-0.99 (P$lt;0.01) in RFP respectively.