Objective To apply the body weight support treadmill training (BWSTT) on slope for gait training in patients after stroke. Methods From March, 2015 to June, 2017, 46 patients after stroke were randomly divided into control group (n=23) and experimental group (n=23). Both groups accepted routine rehabilitation, and the experimental group accepted BWSTT on slope, while the control group accepted BWSTT on flat. They were assessed with Fugl-Meyer Assessment-Lower Extremities (FMA-LE), Berg Balance Scale (BBS) and Tinetti Gait Analysis (TGA) before and after treatment. Results The scores of FMA-LE, BBS and TGA improved after treatment (t>2.491, P<0.05), and were more in the experimental group than in the control group (t>2.195, P<0.05). Conclusion BWSTT is effective on gait in hemiplegic patients, and is more effective on slope.