The invention relates to an accessible roof construction method. The accessible roof construction method comprises the following steps that S1, materials are prepared, wherein wood formworks and reinforcing steel bars are prepared, and the wood formworks with proper sizes are selected as a roof bottom formwork, a roof side formwork, a hole opening side formwork, an additional side formwork and a staircase formwork; S2, structure construction is carried out, wherein the roof bottom formwork and the roof side formwork are supported, the hole opening side formwork is taken to be supported on the periphery of a stair hole opening, and the roof bottom formwork, the roof side formwork and the hole opening side formwork jointly form a roof pouring area, reinforcing steel bars are bound in the roof pouring area, the additional side formwork is supported on the side, away from the stair hole opening, of the hole opening side formwork, a beam pouring area is formed between the hole opening side formwork and the additional side formwork, concrete is poured in the roof pouring area and the beam pouring area, a roof panel and an inserting beam are formed after the concrete is solidified, the staircase formwork is supported, concrete pouring is conducted, and a staircase structure is formed after the concrete is solidified; and S3, staircase installation is carried out, and specifically, the staircase structure is lifted and is enabled to be arranged outside the inserting beam in a sleeving mode. The construction method has the effect of improving the construction efficiency.