Angle-adjustable building engineering formwork fixing support convenient to store

The invention relates to the technical field of constructional engineering, in particular to an angle-adjustable constructional engineering formwork fixing support convenient to store, which comprises a U-shaped base, a U-shaped storage groove is formed in the U-shaped base, and a plurality of fixing piles are connected to the U-shaped storage groove; the accommodating groove is used for accommodating a placement frame of the rotatable template; the placing frame comprises a first U-shaped frame and a second U-shaped frame, openings of the first U-shaped frame and the second U-shaped frame are oppositely arranged, a template mounting area is formed in the first U-shaped frame and the second U-shaped frame, the first U-shaped frame is rotationally connected with the U-shaped base, the first U-shaped frame pushes the second U-shaped frame to be separated from or close to and abut against the first U-shaped frame through the placing frame separating mechanism, and the template mounting area is enlarged or recove