Greenhouse convenient to water and used for tree seedling raising

The greenhouse comprises a greenhouse body, the greenhouse body is of a rectangular structure, a greenhouse roof of an arc-shaped structure is installed at the top of the greenhouse body, a door body is arranged at the left end of the greenhouse roof, a seedling raising device is arranged at the bottom end of the interior of the greenhouse body, and adjusting mechanisms are installed on the two sides of the bottom end of the greenhouse roof. The adjusting mechanism comprises a motor, a threaded rod, an adjusting box and a bearing, a water spraying device is installed on the inner side of the adjusting mechanism, the water spraying device comprises a connecting plate, an installing plate, a water guide pipe and a water spraying head, the motor is fixed to the front end of the bottom of the shed roof, and the threaded rod is connected to the rear end of the motor. The adjusting mechanism and the water spraying device are arranged at the top end of the interior of the greenhouse, the adjusting mechanism can adju