For exploring the practicality of engineered bamboo products in timber structure， the formula of dowel bearing strength parallel to the grain was investigated. In this paper， seven groups of twenty eight specimens were tested. The effect of the thickness of engineered bamboo products， end distance and pin diameter on the maximum load， stiffness and dowel bearing strength were analyzed. It was showed the thickness of engineered bamboo products had no effect on the dowel bearing strength. The effect of end distance on the dowel bearing strength could be negligible with the end distance greater than 64mm. And the dowel bearing strength approximately linear improved with the decrease of pin diameter. The influence coefficient of pin diameter was obtained by regression analysis. Finally， a simplified theoretical calculation formula of dowel bearing strength was establishment. And the results of dowel bearing strength by the theoretical calculation formula had a good agreement with those obtained by test.