The utility model discloses a kind of multi-angle adjustable support device, including installation base, support arm, gear limit stop;Its characterized in that: the upper portion of the installation base is connected with gear limit stop by pivot and spring, gear limit stop is placed horizontally or vertically under the action of pivot and spring;Two chuck structures of the support arm are set and the sleeve kit structure in installation base is interconnected, and chuck structure has rotating effect in sleeve kit structure, so that support arm is rotated on installation base 0~180 degrees;A plurality of gear recesses are provided on the gear limit stop, the number of gear recess and the angle of support arm required to be adjusted are one-to-one matched and set.The utility model structure is set by multiple adjusting structure, so that support has multi-angle adjusting effect, and the product also has the characteristics of simple structure, multi-angle adjustment, strong operation stability and the like.