The invention discloses a hydraulic top swing production line conveying device beneficial for manual machining. The conveying device structurally comprises a supporting cabinet, side baffles, a conveying belt, a driving roller, a triangular support, a supporting foot tripod, a machining table and a hydraulic top swing machining auxiliary device. Through an L-type table plate, under the cooperationeffect of conveying belts at different heights on the front side and the rear side, to-be-machined pieces are taken out of the conveying belts to be machined or put back onto the conveying belts after being machined, the to-be-machined pieces are taken and put easily and conveniently on the premise of not influencing the normal conveying, and workers do not need to stand up or bow; through a topswing mechanism, the to-be-machined pieces can be driven to swing forwards and upwards, the workers can effectively protect the cervical vertebras and spines without bowing or lowering the heads during machining, and meanwhile it can be avoided that machining light is shielded by bowing and head lowering; through a stepping hydraulic mechanism, the to-be-machined pieces can be easily controlled tobe taken and put through stepping, hand control requirements are reduced, and hand burdens are relieved.