The invention discloses an automatic feeding device for tubular objects. According to the automatic feeding device, the lower end of a vertically-arranged rotary shaft is installed on a base provided with a slewing bearing; a unidirectional bearing is arranged at the top end of the rotary shaft; a bearing seat of the unidirectional bearing is connected with a power device, and the rotary shaft is enabled to unidirectionally rotate under pushing of the power device; horizontally-arranged tubular object installation discs sleeve the rotary shaft; a plurality of semicircular clamping grooves are equally distributed on the outer circumferential surface of each installation disc; a plurality of clamping hands used for clamping the tubular objects are arranged on each installation disc; each clamping hand is located on the corresponding semicircular clamping groove and is in one-to-one correspondence with the corresponding semicircular clamping groove; the two installation discs are arranged with one above another; and the power device is located on an installation support which is vertically arranged on the side surface of the rotary shaft. According to the automatic feeding device disclosed by the invention, automatic cyclic working can be realized only by installing the tubular objects once, without the need of manual intervention, thus the labour intensity is reduced, the working efficiency is increased, and the cost is reduced. The automatic feeding device can be used for automatic conveying for storage, guide and conveying of tubular objects needing to be used in occasions, such as geological prospecting machinery, foundation pile driving, petroleum exploitation, well drilling and the like.