Sun-shading device for greenhouse seedling raising of Tibet plateau facility

The invention discloses a Tibet plateau facility greenhouse seedling raising sunshade device which is installed on the top of a foundation wall body, the foundation wall body is of a semi-arch structure, a notch is formed in one side of the foundation wall body, the notch is blocked by a greenhouse body, and the greenhouse body is transparent and comprises a positioning frame fixed to the top of the foundation wall body; the accommodating bin is positioned and mounted on the positioning frame; the winding roller is rotationally arranged in the containing bin; one end of the sunshade net is correspondingly connected with the winding roller, and the other end of the sunshade net is connected with a weight increasing roller; a time module is integrated in the controller, and the controller can control the winding and unwinding actions of the winding roller according to the feedback of the time module; the containing bin, the winding roller, the weight increasing roller and the sunshade net all extend in the leng