A seedling conveying trolley comprises a first cross beam, a second cross beam parallel to the first cross beam, a first keel beam, a first supporting beam, a first longitudinal beam, a second longitudinal beam and first seedling tray racks. One end of the first keel beam is connected with the first cross beam, and the other end of the first keel beam is connected with the second cross beam. The first supporting beam is connected with the first cross beam and is parallel to the first keel beam, and the first supporting beam is close to the end of the first cross beam relative to the first keel beam. The first longitudinal beam is perpendicular to the plane where the first cross beam and the first supporting beam are placed, and the first longitudinal beam is connected with the first keel beam. The second longitudinal beam is connected to the first supporting beam and is parallel to the first longitudinal beam. The first seedling tray racks are connected with the first longitudinal beam and the second longitudinal beam, and a plurality of first seedling tray racks are arranged along the first longitudinal beam. According to the seedling conveying trolley, multiple seeding trays can be conveyed at one time, the conveying efficiency is improved, displacement of nutrient soil and seeds in the seedling trays can be avoided at the same time, and damage to seedlings in the seedling trays is avoided.