The present invention relates to a cargo vehicle fuel theft prevention device configured to open and close the cover simply by using a switch connected to the motor during fuel injection. Freight vehicle fuel anti-theft device includes a fuel inlet 34 connected to the fuel inlet pipe 32 formed on one side of the fuel tank; A fuel cap 36 inserted into the fuel inlet 34; A fastening cap 38 installed above the fuel inlet 34 and configured to be openable and closed; A plurality of fastening cap operating gears 40 installed at one side of the fastening cap 38 at predetermined intervals; A motor 42 connected to the fastening cap operating gear 40; It consists of the switch 44 electrically connected to the motor 42. Freight vehicle fuel anti-theft device of the present invention can open and close the fastening cap with a switch to prevent theft of the fuel, there is an advantage that can prevent the contamination of the fuel cap.
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