This study aimed to identify effective fungicides for controlling oat leaf spot caused by Drechslera avenae.Toxicity and field control experiments were conducted on 7 chemical fungicides. The results showed that 50% procymidone and 58% metalaxyl mancozeb had the obviously inhibition on Drechslera avenae, with EC₅₀ of 0.404 μg/mL and 0.712 μg/mL, respectively. The control effects of 15% triadimefon, 50% carbendazim and 40% thiram amicarthiazol were 66.55%, 60.20% and 57.52%, respectively, the yield increase rates were 49.53%, 28.29% and 31.83%.The best spraying effect was 50% carbendazim, the control effect was 57.52%, the yield increased 42.15%. 15% triazolidone, 40% thiram amicarthiazol and 50% carbendazim were mixed seed, and the foliar spraying was done using50% carbendazim, effective control against oat leaf spot was observed.