The utility model provides a variable angle board is used in teaching, belongs to teaching aid technical field. It is including articulated complex main scale A and main scale B, the cooperation of the articulated department of main scale A and main scale B set up the angle board, the articulated bent angle pole B of main scale A, the articulated bent angle pole A of main scale B, the articulated cooperation of bent angle pole A and bent angle pole B. A foretell variable angle board is used in teaching, simple structure, reasonable in design, its function that has fused ruler, set square and graphometer, it is more convenient, quick that the messenger draws a picture, and it is more convenient that the messenger carries, and the practicality is strong.