The invention discloses a drilled pile construction method, and relates to the field of constructional engineering. The drilled pile construction method comprises the following steps of S1, performingconstruction preparation; S2, burying a protective cylinder; S3, arranging a mud pool; S4, performing drilling machine drilling, namely, drilling by using a drilling machine; S5, performing primary hole cleaning, namely, cleaning a hole after the hole is drilled to a designed depth; S6, placing a steel reinforcement cage, namely, after the steel reinforcement cage passes acceptance inspection andwhen pre-operation is performed, splicing the steel reinforcement cage according to a designed size by an operator; and when the steel reinforcement cage is required to be placed, lifting the splicedsteel reinforcement cage to the position above a hole opening, and placing vertically and slowly; S7, placing a guide pipe; S8, performing secondary hole cleaning, after the guide pipe is placed, performing secondary hole cleaning through the guide pipe; S9, pouring underwater concrete; and S10, pulling up the protective cylinder. The trouble in performing butt welding on the steel reinforcementcage at the hole opening when the steel reinforcement cage is placed is avoided, so that the operation of placing the steel reinforcement cage is more convenient; and the construction period of the drilled pile is also shortened.