In order to overcome the problems of high labor cost and low construction efficiency caused by a traditional way of manually screwing in (out) piles, the invention aims to provide an assembled hydraulic pile screwing machine, which comprises 2 trolleys, a diesel engine, a hydraulic pump, a hydraulic oil tank, hydraulic oil pipes, a hydraulic motor, a bracket and a linking port, wherein the dieselengine is connected with the hydraulic pump and is fixedly mounted on one trolley as a whole; the hydraulic oil tank is fixedly mounted on the other trolley separately; the hydraulic pump; the hydraulic oil tank and the hydraulic motor are communicated through two hydraulic oil pipes; and the hydraulic motor is connected with the linking port through the bracket. The machine has the advantages that the construction efficiency can be improved, and the labor cost is reduced.