Combined invisible protective net

The utility model provides a combined invisible protective net which comprises a frame and a grid mesh. The frame is provided with an upper cross beam, a lower cross beam and installing holes, wherein a rectangular track groove is formed in the upper cross beam of the frame, two sides of a groove opening of the rectangular track groove are inward provided with turnup edges, and the turnup edge on one side of the groove opening is provided with a gap. The grid mesh is composed of grid mesh units, wherein each grid mesh unit comprises an upper square tube, a lower square tube and solid strips. The upper square tube is connected with the lower square tube through the solid strips and connected with the frame through the gap clamped into the rectangular track groove, and the lower square tube is provided with a threaded hole corresponding to the installing hole and fixed on the lower cross beam through U-shaped fasteners and screws. The combined invisible protective net can be conveniently installed and dismounte