Construction method for prefabricating and assembling non-dismantling formwork of constructional column

The invention discloses a construction method for prefabricating and assembling a non-dismantling formwork of a constructional column. The construction method comprises the following construction steps that S1, formwork machining is conducted; s3, formwork installation is conducted, specifically, a layer of binding agent is smeared on the joint of the formwork installation wall through the binding agent, and a material filling opening is reserved when an upper formwork of the constructional column is manufactured; s4, the formwork is reinforced, specifically, the outer side of the formwork is reinforced through a fixing piece, a screw hole is reserved in the front batten according to the position corresponding to a pull screw, and during batten reinforcement, the vertical batten, the transverse batten and the additional transverse batten are connected with one another; s5, a filling hopper is installed; s6, the formwork is removed; compared with a traditional wood formwork, the prefabricated formwork has the