Abstract: Calculating output value of silvieulture must follow the general principles of output value calculation and reflects the particularities of silviculture production. In this paper, two concepts calculated price of output value and coefficient of increment are put forward, with which the problem of calculating output value of silviculture is solved in theory. According to the simple and convenient principle in practical application, the concept of coefficient for output value calculation and its principle for application is suggested and the caleulating formula is simplified.