The invention discloses a portable automatic meteorological station checking device. In the device, an information collection host and handheld checking extensions are mutually independent, and each handheld checking extension can be used solely and can check multiple sub collectors and sensors, so that checking efficiency is improved; the handheld checking extensions are wirelessly connected with the information collection host, so that convenience is brought to checking meteorological sensors far away from a meteorological station; the handheld checking extensions can check meteorological sensors of five signal types, so that the types of the meteorological sensors which can be checked are comprehensive; the information collection host adopts a touch liquid crystal display screen, so that operation is convenient; a high-capacity SD card is adopted as a storer, so that a lot of checking data can be stored; a USB (universal serial bus)-host port is connected with a USB wireless network card, so that the checking data can be sent to a server and an externally-arranged control terminal in real time; the information collection host and the handheld checking extensions are arranged in a portable storage device like a luggage or a backpack, thereby being convenient and easy to carry.