The invention discloses automatic screening and charging equipment and a charging method thereof. The automatic screening and charging equipment comprises a control device for controlling overall operation of equipment, a charging device for conveying raw material powder, and a vibration screening device for screening the raw material powder, wherein the vibration screening device is fixedly connected with a rough material box and a fine material box; the charging device and the vibration screening device are electrically connected with the control device; the charging device is fixedly connected with the vibration screening device; a charging component is connected with a raw material box by virtue of a powder conveying pipe; and the fine material box is connected with the charging device by virtue of the powder conveying pipe, and accomplishes material feeding to an external material box of sintering equipment by virtue of the charging device. According to the automatic screening and charging equipment and the charging method, the labor intensity of operators is reduced and the production efficiency is improved. In addition, the dustless effect of an operating room is realized, and physical health of the operators is protected. Furthermore, the automatic screening and charging equipment is simple in structure, and has very high popularization and application values and very high applicability.