Modularized house fresh air system

The utility model relates to a modularized house fresh air system which comprises a house body, a positive pressure fresh air assembly and an exhaust assembly. The positive pressure fresh air assembly and the exhaust assembly are installed on the outer wall of the house body. The positive-pressure fresh air assembly comprises a positive-pressure fresh air machine, a housing arranged on the outer side of the positive-pressure fresh air machine in a covering mode and a plurality of filtering pieces inserted into the housing. The air exhaust assembly comprises a plurality of air exhaust grooves formed in the outer wall of the house body and an air exhaust baffle capable of being pushed. A modular house is mainly suitable for occasions such as construction sites, the dust content in the surrounding environment is large, and the modular house is not suitable for daily long-time window opening ventilation, when the modular house works, doors and windows are closed, the exhaust baffle is opened, the positive-pressur