Protective net for earthwork bedding in constructional engineering excavation

The protective net comprises two protective net bodies and two fixing shells, the lower half portions of the fixing shells are inserted into the ground, the protective net bodies are partially located in the corresponding fixing shells, adjusting shells are arranged in the fixing shells, the inner walls of the adjusting shells are fixedly connected with first motors, and the inner walls of the first motors are fixedly connected with second motors. The output end of the first motor is in transmission connection with a driving rod, the protective net body is partially wound on the peripheral face of the driving rod, the protective net body penetrates through the inner top wall of the adjusting shell, a side opening is formed in the upper half portion of one side of the fixing shell, and the protective net body penetrates through the corresponding side opening. Wherein one side of one protective net body is fixedly connected with a plurality of connecting ropes, and one side of the other protective net body is f