The invention discloses a power grid interaction type electric automobile intelligent charging device, comprising charging piles, a power grid interaction device and a power distribution cabinet; the power grid interaction device is arranged in the power distribution cabinet; all the charging piles which are powered by the same one power distribution cabinet are connected to the power distribution cabinet through a three-phase power supply wire in a wiring slot; all the charging piles are in communication with the power grid interaction device through GPRS; the power grid interaction device determines a whole pile power need of each charging pile according to the whole pile operation states of all the charging piles, a charging need of a user, a charging need of an electric automobile and usage condition information of a charging pile inner power supply; a supply and demand ratio is obtained through dividing a power grid capacity by total power need of the power distribution cabinet; and maximum available power of each charging pile can be obtained through multiplying the supply and demand ratio with the whole charging pile power need of each charging pile and is sent down to each charging pile through the GPRS module. The power grid interaction type electric automobile intelligent charging device reasonably distributes power output of all the charging pile of one power distribution cabinet, and realizes safety, high efficiency and fast charging under a condition that electric power capacity is not exceeded.