It is an emerging measure of soil and water conservation to add polymers in soil. Clarifying its effects on soil erosion can provide a scientific basis for controlling soil erosion and selecting measures on loess slope. A simulated rainfall experiment was conducted to study the regulating effect of new chemical materials Jag C162 on infiltration on loess slope. Results showed that:(1) After dry spreading Jag C162, infiltration rate showed a decreasing trend with increasing rainfall time, whose decrease rate was less than bare soil. During rainfall, infiltration into bare soil reached a steady infiltration stage, while infiltration rate did not reach a steady state after dry spreading Jag C162. Initial runoff time was postponed correspondingly. (2) For the slope with different rainfall intensities and the rainfall intensity with different slopes, infiltration rate had significantly increased after dry spreading Jag C162. The stable infiltration rate of bare soil and average infiltration rate after dry spreading showed an increasing trend with increasing rainfall intensity and decreased with increasing slope. (3) Infiltration capacity for dry spreading Jag C162 was significantly higher than bare soil. With different doses, the infiltration capacity presented a general incremental trend with rainfall intensity increased, and infiltration capacity was decreased with slope increasing. (4) After dry spreading Jag C162, infiltration rate was increased and surface runoff and soil erosion were reduced.