The invention relates to an automatic long pipe stacking device. The automatic long pipe stacking device comprises a to-be-stacked material frame device used for receiving to-be-stacked steel pipes, a stacking device body used for conveying the to-be-stacked steel pipes in the to-be-stacked material frame device, a piling device used for piling the to-be-stacked steel pipes conveyed by the stacking device body into a certain shape, and a stored material conveying device used for conveying the stacked steel pipes in the piling device out of the stacking device. The to-be-stacked material frame device comprises a support, a to-be-stacked material table, a detection switch used for detecting whether the steel pipes are fed in or not, and a jacking device used for jacking the steel pipes. The to-be-stacked material table is arranged on the support, one end of the to-be-stacked material table is a feeding end, and the other end of the to-be-stacked material table is a discharging end. The jacking device and the detection switch are arranged on the to-be-stacked material table. The piling device and the stored material conveying device are arranged outside the discharging end of the to-be-stacked material table, and the stacking device body is arranged between the jacking device and the discharging end. The automatic long pipe stacking device is an automatic stacking device, the problems that during existing steel pipe manual stacking, labor intensity is large, and operation needs to be conducted through specially-assigned persons are solved, and the beneficial effects of automation and unmanned operation are achieved.