Lightweight human body behavior recognition method and device

The invention is suitable for the technical field of human body behavior recognition, and provides a lightweight human body behavior recognition method and device, and the method comprises the steps: obtaining the two-dimensional coordinates of a plurality of skeleton key points of a target human body according to a human body image; obtaining two-dimensional coordinates of a plurality of human body parts according to the two-dimensional coordinates of the plurality of skeleton key points; determining a characteristic angle and a variable quantity of the characteristic angle according to the two-dimensional coordinates of the at least two human body parts; and inputting the characteristic angle and the variable quantity of the characteristic angle into a behavior recognition network model to obtain a behavior category of the target human body. According to the method, the characteristic angle obtained according to the human body image and the easily obtained parameter of the variable quantity of the character