The utility model relates to a plastic door, which is composed of a door panel, edge sealing parts and corner connectors. The utility model is characterized in that the edge sealing part is a hollow profile, and a strengthening rib is additionally arranged on the edge sealing part; the corner connectors are arranged on all the four corners of the door panel and fixed by screws; thus, the integral strength of the door panel is enhanced, the door panel is not easy to be deformed, the edge sealing parts are not easy to fall off, and the service life can be prolonged. The utility model has the advantages of reasonable design, simple structure, low cost, light, easy assemblage and smooth appearance. The utility model can be widely used as inside doors, partition doors and restroom doors in homes, hotels, office buildings, etc.