The utility model relates to a soil-preparation, pesticide-spraying, film-laminating and hole-punching combined machine for an onion pool. The soil-preparation, pesticide-spraying, film-laminating and hole-punching combined machine consists of a suspension bracket, a rack, a power transmission system, a soil preparation device, a film laminating mechanism, a pesticide spraying device, a film surface hole punching device and earth banking apparatuses, wherein the whole machine utilizes the rack with a suspensible rectangular frame structure, the suspension bracket is fixedly arranged at the center of the front end of the rack and is directly connected with a three-point hydraulic suspending device of a drawing tractor, the soil preparation device is arranged below the front part of the rack, the film laminating mechanism is arranged at the adjacent back part of the soil preparation device, the pesticide spraying device is arranged at the center of the upper part of the whole rack, the film surface hole punching device is arranged at the tail of the rack, one earth banking apparatus is respectively and fixedly arranged close to the two outer sides of the film surface hole punching device, and the power transmission system connects the power output shaft of the drawing tractor with the soil preparation device. When the machine works on field, a combined operation process of soil preparation, pesticide spraying, film laminating, hole punching and the like in the onion pool can be finished at one step, and the operation efficiency is extremely improved.