Forklift frame structure with side opening

The invention discloses a forklift frame structure with a side opening. The side opening is formed in the side face, corresponding to the position where a battery is placed, of the bottom of a forklift frame, a battery door is installed at the side opening, an insertion groove is formed in the bottom, and an opening of the insertion groove right faces the side opening. By means of the forklift frame structure with the side opening, the side face of the forklift frame is designed to be of an open structure, the battery is replaced through tools such as a forklift from the side face by opening a battery cover and the battery door, and a user can replace the battery more conveniently.