The invention discloses a new energy automobile battery box easy to dissipate heat and convenient to clean. The new energy automobile battery box comprises a box body, wherein a box cover covers the top of the box body; an inner cavity of the box body is provided with separating plates at equal intervals from left to right; two ends of each separating plate and the front part and the rear part of the inner wall of the box body are subjected to thermoplastic forming; a battery placement cavity is formed between each separating plate and the inner wall of the box body; a heat radiation passage is arranged on the upper surface of each separating plate; flow guide plates are arranged in the heat radiation passage from front to back at equal distance in a staggered way. The new energy automobile battery box easy to dissipate heat and convenient to clean has the advantages that the independent heat radiation passage is arranged between the two adjacent battery placement cavities for heat dissipation; the flowing of gas in the heat radiation passages can be used for driving the radiation of heat in the battery placement cavities; the heat radiation effect is better; through the arrangement of the flow guide plates, the moving distance of the gas in the heat radiation passages can be prolonged, so that the gas is in full contact with the inner wall of the heat radiation passages; the heat dissipation effect is improved.