Sand blasting machine

The utility model relates to a sand blasting machine which comprises a tank body, a containing cavity used for containing sand grains is formed in the tank body, and the tank body is provided with a sand outlet communicated with the containing cavity. The sand blasting pipeline is arranged on the outer side of the tank body, and one end of the sand blasting pipeline is connected with the tank bodyand corresponds to the sand outlet; the air outlet end of the first pipeline extends into the tank body, and the air outlet end of the first pipeline and the inner wall of the tank body are arrangedin a spaced mode and correspond to the sand outlet; and the air source device is used for supplying air to the first pipeline, and the air inlet end of the first pipeline is connected with the air source device. The air outlet end of the first pipeline is embedded into the sand grains in the accommodating cavity; the sand outlet is close to the sand outlet; the air source device supplies air to the first pipeline, air with