近年来,角规测树的方法得到日益广泛的发展。特别是当一种新式仪器——史披杰速测镜(Spiegel-relaskop)制出以后,方法的应用更加趋于完善。在各种林业调查的测树工作中,角规的方法充分显出了多、快、好、省的特点。本文将说明角规测树的基本原理和方法。对原理、方法本身所具有的性质和特点也作了一些研究。并且 In recent years, the angle measurement tree method has been increasingly widespread. Especially when a new instrument, the Spiegel-relaskop, is used, the application of the method is more and more perfected. In a variety of forestry survey tree work, angle gauge method fully demonstrated the characteristics of more, faster, better, provincial. This article will explain the basic principle and method of angle measurement tree. There are some researches on the nature and characteristics of the principle and method itself. and