The invention discloses a method for improving photosynthetic characteristics of wheat. The method comprises the following steps: S1: applying base fertilizers; S2: sowing; S3: pouring water; S4: topdressing; S5: re-pouring water. The method comprises the following steps: firstly, utilizing ridge sowing technology to sow wheat such that ridges can prevent wind and shield snow so that ground temperature is increased and soil moisture conservation is improved; adding soil moisture after snow in Spring thaws, which is good for green-returning and growth; topdressing nitrogen fertilizers in the jointing period of wheat so that freeze injury due to overgrowth at the initial stage is avoided and loss of nutrition is prevented as well as requirements for flowing at the later period and nutrition in a grouting period are met. Meanwhile, reduction in effective leaves, content of chlorophyll and photosynthetic rate in the later period of wheat slows down. Nitrogenous fertilizers are uniformly applied in furrows and easily absorbed and utilized. Therefore, utilization rate of fertilizers is high. Due to the small contact area between fertilizers and soil, nutrient elements are fixed at the lower degree with effective time longer than broadcast application.