The authors investigated the effects of universal joint and specimen storage time after bonding with the universal joints on surface bond strength of medium density fiberboard（MDF）.The results showed that the specimen exhibited higher surface bond strength when two universal joints were used compared to none or one universal joint was used.As the storage time was extended from 0 to 6 hours,the surface bond strength first increased,reached the maximum value at 1 hour,and then decreased to become stable.