In order to improve the land productivity, increase the income of farmers, field experiment was carried out to explore the efficient way of double bumper harvest about grain crops and economic crops. After 3 years of study, the authors created a “first cropping rice + ratoon rice + potato” high efficient planting mode. The results showed that the mode has high yield and efficiency. The total yield was 63.25 t/hm2, the yield of first cropping rice was 13.14 t/hm2, the yield of ratoon rice was 2.68 t/hm2, the yield of potato was 47.43 t/hm2, and the total output value was 169 800 yuan/hm2, the total net income was 120 300 yuan/hm2. This article summarized the key techniques of “first cropping rice + ratoon rice + potato” planting mode.