In-vehicle sunshade umbrella

The present disclosure relates to an in-vehicle sunshade umbrella, including: an umbrella shaft; umbrella ribs connected to the umbrella shaft, wherein the umbrella ribs slide along the umbrella shaft to fold or unfold; and an umbrella canopy including a first surface and a second surface opposite to each other, wherein at least one of the first surface and the second surface is connected to the umbrella ribs, a cavity is formed between the first surface and the second surface, and the first surface and the second surface fold or unfold synchronously with the umbrella ribs. The present disclosure aims to solve the problem that a single-layer umbrella canopy structure has a limited heat insulation effect and cannot effectively block thermal radiation from sunlight, which results in a relatively high temperature inside a vehicle.